Question

find the exact values of the sine, cosine,

and tangent of the angle.

Answer 1

Step 1:

The angle is .

Sum formula of trigonometric function : .

.

Step 2:

Sum formula of trigonometric function : .

.

Step 3:

Quotient identities of trigonometric function : .

Rationalize the denominator with .

                              

.

Solution :

.

.

.