WEBVTT
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So we have Ah, part A. For which
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it says Why is equal to co sign two pi
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X So the amplitude here would be one. The
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period would be two pi divided by two pipe which
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is equal to what? So in order to draw
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a graph, we are going to need points where
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X equals is your point to find your 0.0.5,
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you know, 0.75 and 1.0 and the aptitude is
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one. So we will just put these lines that
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why is it going to one and likewise equal to
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negative one? So these with service guy ignites.
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So we're now already control the graph and this is
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what the graph will look like. So the next
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thing you want to talk about our p X intercepts
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Okay, so there are two X intercepts at X
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is equal to 0.25 and it X is equal to
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0.75 And then the function is increasing over X values
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going from 0.52 one place you. Now let's take
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a look at part B. So for part B
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, the equation we have is wife's equal to negative
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four co sign two pi X. So the aptitude
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is four. The P idiot is too high,
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divided by group. I just going to one.
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So let's draw this graph here on the X axis
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. Very interested in France where it is, we
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will point to 5.50 point 75 and one point you
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on the fly access we're interested in and where y
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is equal to four and where what is equal to
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negative for. So let's put these two horizontal lines
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in there now. We're already draw the graph.
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Since it's a negative course and function its star that
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Y is equal to negative for so this is worth
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the graft would look like so X intercepts. There
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are two X intercepts at X equal to 0.25 and
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X is equal to 7.75 and then the function is
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increasing over X values reading from 0 to 0.5