1.

Establish the identity. cos u secu + tan u = 1 - sin u Write the left side in terms of sine and cosine. secu + tan u = + Simplify by writing the expression from the previous step over a common denominator. cos u Rewrite the expression from the previous step by multiplying the numerator and denominator by 1 cos u(1 - sin u) (Simplify your answer.) Write the numerator of the expression from the previous step in terms of cosine. cos u(1 - sin u) cos u The fraction from the previous step then simplifies to 1 - sin u using what? O A. Pythagorean Identity O B. Cancellation Property O C. Reciprocal Identity O D. Even-Odd IdentityEstablish the identity. csc 0 3 cos 0 = 4 cot 0 sec 0 sin 0 Write the left side of the identity in terms of sine and cosine. Rewrite the numerator and denominator separately. 3 cos 0 + (Do not simplify.) sin 0 Simplify the fraction from the previous step such that both the fractions have the common denominator sin 0. 3 cos 0 sin 0 sin 0 The expression from the previous step then simplifies to 4 cot 0 using what? O A. Addition and the Cancellation Property O B. Addition and a Quotient Identity O C. Addition and a Pythagorean Identity O D. Addition and an Even-Odd Identity O E. Addition and a Reciprocal Identity6 1: Given that cos 6 = - g, E