Write each function value in terms of the cofunction of a complementary angle.

sin 15°

Write each function value in terms of the cofunction of a complementary angle.

sin (2π/5)

Write each function value in terms of the cofunction of a complementary angle.

sin 142° 14'

Write each function value in terms of the cofunction of a complementary angle.

cot (9π/10)

Write each function value in terms of the cofunction of a complementary angle.

sin 98.0142°

Use identities to fill in each blank with the appropriate trigonometric function name.

sin 2π/3 = _____ (- π/6)

Use identities to fill in each blank with the appropriate trigonometric function name.

____ 72° = cot 18°

Find one value of θ or x that satisfies each of the following.

tan θ = cot(45° + 2θ)