How do you use transformation to graph the cosine function and determine the amplitude and period of $y = cos (- 4 x)$ $y=cos(-4x)$ ?

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Answer 1 · 2018-03-26T12:32:52

Amp is 1
Period is $- \frac{π}{2}$ $-pi/2$

$A cos (B (x - C) + D$ $Acos(B(x-C)+D$

A is the amplitude
period is $\frac{2 π}{B}$ $(2pi)/B$
C is the vertical translation
D is the horizontal translation

So amp in this case is 1

Period is $\frac{2 π}{- 4} = - \frac{π}{2}$ $(2pi)/-4=-(pi)/2$

How do you use transformation to graph the cosine function and determine the amplitude and period of y=cos(−4x)y=cos(-4x)?