Question

Which angles are represented by the same point on the unit circle as pi/4? Select all that apply.

Answer 1

The function is given as ,

$f(x)=\cos x.$

According to the trigonomteric values of cos ,

$\cos \text{ 0}=1$$\cos \text{ }\frac{\Pi}{2}=0$$\cos \Pi=-1$$\cos \frac{3\Pi}{2}=0$

The graph suitable for the cos x is, the option c which satisfy the above conditions.

Hence the correct grapha and option is c.