The values are  and . \ \

Since then and .

Since the angle is , the point lies in second quadrant.

The point is .

Thus,

.

.

Since then  and .

Since the angle , the point lies in first quadrant.

The point  is lies on the curve of radius .

Thus,

.

Since the point lies in first quadrant, consider .

The value of sine function is .

.

(a)

The expression is 

From the sum formula for the sine function.

.

Substitute , ,   and in above equation.

Thus,

.

(b)

The expression is .

From the sum formula for the cosine function.

.

Substitute , , and in above equation.

Thus,

.

(c) The expression is .

From the sum and difference formulas for the sine function.

.

Substitute , ,   and in above equation.

.

(d)

The expression is .

.

 Evaluation of  .

.

From (c), .

.

 (a)  .

(b)  .

(c)  .

(d) .