find frequency for f(θ)=−1.75 cos(1/2(θ + 60°))
Frequency = 1 / period
We can find the period of f(θ)=−1.75 cos(1/2(θ + 60°)) thusly :
(1/2)x = 2pi multiply both sides by 2
x = 4 pi ......and this is the period
So the frequency = 1 / [4 pi ]
