y 35 cos x a Amplitude b Period do not give decimal answers

y= -3.5 cos x

a) Amplitude ?

b) Period (do not give decimal answers, state as whole number, fraction or in terms of pi.)

c) Phase shift (state as whole number, fraction or in terms of pi. Also state the direction, left or right. If ther\'s no phase shift, state 0.)

Solution

y= -3.5 cos x

General sin function: y = Asin(B(x-C) +D

compraing with gen. function we get:

a) Amplitude = 3.5

b) Period = 2pi/B = 2pi/1 = 2pi

c) Phase shift = 0 deg