WEBVTT
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all right, so we are dealing with a trigonometry
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problem now. The biggest thing we actually have to
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worry about most trigonometry problems is answering this question.
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Should we choose degree mode or should we choose radiant
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? Because when we're dealing with trig problems, there's
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actually two different ways. They describe an angle either
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using the degrees or using something called Great. Now
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, if we want to use, the green mode
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will notice that our numbers have a degree symbol in
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them, like 72 degrees, 104 degrees, or
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721 agreed. Radiant Mode describes our angles using the
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value of pi. It will either see it with
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the pie value, or you might see it as
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a number with a decimal so the others could see
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you like high over four reef high over six,
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Chief High. Or you might see numbers that look
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like to point. Thanks 3.14 things like that,
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but they are all missing that degree symbol. So
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that's when we know we need to choose radiant mode
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over the agreement. Now, why this is important
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is because our calculators actually have to be switched in
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between those bones based on how I'm solving my problem
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. So it a basic scientific calculator like this Casio
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you have to be able to be switched between those
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. If this is what you choose to use for
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your calculation, so to switch between them gonna want
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to know where your shift is and you're set up
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. He had not all scientific cap letters from this
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way, But this is your standard model. So
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this is just a way I can show you what
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you're looking for. So once you hit, shift
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first and then set up, you're gonna have this
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menu here that shows you all the different ways we
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can change your calculator and the two important ones in
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this problems our number three and number four number three
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, which is our degree mode number four, which
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is our radiant move on whatever. When we choose
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, we just have to pick that number on our
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looking for degree. We hit three for looking for
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radiant. We hit for and then from there are
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we'll see that right here there's a little box with
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the letter in to represent what mover in So that
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has a deep that truck killer Avian degree mode and
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these scientific calculators 10 just start in degree mode as
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their default setting. Whereas if you're using a Texas
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instrument, graphing calculator or any of the graphing calculators
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, he's actually tend to start in radiant mode and
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then you have to be able to switch between them
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. So for these ones to switch between them,
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what we do is we use this mo button.
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It's right here next to this second button. The
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second is one of your two color buttons, normally
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blue or yellow, depending on which one we're dealing
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with. And all we have to do is hit
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mode, and we can see all of these possibilities
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of how we can switch your calculator. But again
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, the to import ones. I'm looking for the
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words radiant and degree, and right now I can
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see that radiant is one with the black box around
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it. So I have to use my arrow pads
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here. I'm just gonna school down till I get
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to it, being blinking on radium, and then
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I can use my left right arrows to be able
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to choose between those two mode. If I want
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to switch it, I highlight the one I want
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to switch to you, hit the enter key here
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at the bottom, and it will switch that black
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box to mold that it is now in. And
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then to exit this menu, I mean her head
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clear, or I can see that I have the
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word quick here about mode, but it's in blue
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. So I hit the blue button first, or
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being yellow, using the other mode or other Texas
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instrument, and I just hit second mode to get
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out of that. That's really the biggest question you
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have to answer here is what am I going to
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be solving this problem in going back to the question
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at hand, I want to solve sign of 39
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degrees. That means I need to be in degree
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moat now, depending again on the stylist calculator I
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have. It might change exactly how I enter it
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in my calculator, either. I'm gonna hit this
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sign button first. 39 degrees. Um, I'm
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gonna close my bracket and hit equals air, and
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I'll show you what that looks like. That's how
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these graphing helped letters and most of the scientific ones
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work as well, so we'll see that the sign
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button, which is here above 789 when I click
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that I already get an open bracket, and that's
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why I don't have to start my bracket. It's
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already started or me. What I just have to
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do then, is type 39 lows my bracket off
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and hidden. What? There's another way I could
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have this calculator run and some of the scientific toddlers
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actually require me to hit 39 1st then sign enclosed
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my bracket, and that would be similar to this
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style here. So if you notice I try to
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do sign first, then hit 39 equals I get
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39 is an ant, and that's because it's actually
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doing the sine function. So what I actually have
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to do is have to go 39 1st Then click
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on my sign, finish off my bracket and hidden
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and again it will give me that exact same number
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. So just be aware of what your calculator does
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and how those differences 10 affect your answer. But
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here we're getting the exact same answer for both.
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Um, it's an extremely long number. What will
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we do? Write it out. We do tend
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to just write the 1st 4 numbers. After the
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dust settles and apply around these rules, as you
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normally would. This zero in nine three. Now
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, with the closing bracket, that's mostly just in
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case. We want to do another calculation afterwards by
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closing off that bracket and then making sure that the
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39 is the only thing happening with Signe and nothing
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else actually being applied to the sign itself. So
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again, just make sure you're in the right mode
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degree or radiant. And then from there you just
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have to type your trig functions sign and the value
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that you want to solve for whether it's a degree
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, value, our rating value and then close your
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bracket and hit. So hopefully that helps in trying
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to calculate out this kind of problem. And again
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, just make sure you are very familiar with how
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your calculator functions and being able to switch between those
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mode