Question

Evaluate [ sin^2 -(cos^2@)(sin^2)]^-1 for @=30 degrees. The value of this expression is

Answer 1

Explanation:

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant.

− sin ( π 2 )

The exact value of sin ( π 2 ) is 1 .

-1.1

Multiply

− 1 by 1 .

−1

SIN (3 PIE/2)