Optional Trig Identities Test Review

Front

What is the simplified form of sin x cot x?

Back

cos x

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

If cos(θ) = 5/13 and 3π/2 < θ < 2π, what is sin(2θ)?

Back

-120/169

Front

What is the reciprocal identity for csc(x)?

Back

csc(x) = 1/sin(x)

Front

What does even symmetry mean in trigonometric functions?

Back

Even symmetry means that f(-x) = f(x), such as cos(-θ) = cos(θ).

Front

What is the value of sin(90° - x)?

Back

cos(x)

Front

What is the Pythagorean identity involving sin and cos?

Back

sin²(x) + cos²(x) = 1

Front

What is the value of cot(x) in terms of sin and cos?

Back

cot(x) = cos(x)/sin(x)

Front

What is the relationship between the angles 30° and 60°?

Back

They are complementary angles.

Front

What is the formula for sin(2θ)?

Back

sin(2θ) = 2sin(θ)cos(θ)