Question

Find the exact values of the sine, cosine, and tangent of the angle. 1) 195 degrees and 2) 7pi/12?

Answer 1

(1)

Step 1:

The angle is .

Additive identity of the sine function is  : .

Additive identity of the cosine function is  : .

Additive identity of the tan function is  : .

Solution :

,  , and .

Answer 2

(2)

Step 1:

The angle is .

Additive identity of the sine function is  : .

Additive identity of the cosine function is  : .

Additive identity of the tangent function is  : .

Solution :

,  , and .