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{ }(\Pi)/(2)=0`
`\cos \Pi=-1`
`\cos (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.