# How do you find the amplitude and period of y=3/4costheta?

Mar 18, 2018

$A m p l i t u \mathrm{de} = A = \left(\frac{3}{4}\right)$

"Period = P = 2pi

#### Explanation:

$y = A \cos \left(B x - C\right) + D$

Given $y = \left(\frac{3}{4}\right) \cos \theta$

$A m p l i t u \mathrm{de} = A = \left(\frac{3}{4}\right)$

"Period = P = (2pi) / |B| = (2pi) / 1 = 2pi

graph{(3/4) cos x [-10, 10, -5, 5]}