Question

What is the period of `f(t)=cost`?

Answer 1

`2pi` or `360"°"`

Explanation:

graph{y=cosx [-1,13, -4,3.4]}
Observe the length of a cycle from the graph of `f(t)=cost`.

OR

We know that the period of cosine function is `(2pi)/c`, in `y=acosctheta`.

• In `f(t)=cost`, `c=1`.

`:.` The period is `(2pi)/1=2pi`.