Unit 4 Trig Identities

Front

What is the identity for sin(-x)?

Back

sin(-x) = -sin(x)

Front

What is the identity for cos(-x)?

Back

cos(-x) = cos(x)

Front

What is the identity for tan(-x)?

Back

tan(-x) = -tan(x)

Front

What is the relationship between cotangent and tangent?

Back

cot(θ) = 1/tan(θ)

Front

If cot(θ) = 3, what is tan(θ)?

Back

tan(θ) = 1/3

Front

What is the Pythagorean identity involving sin and cos?

Back

sin²(θ) + cos²(θ) = 1

Front

How do you factor 1 - 4sin²(x)?

Back

(1 - 2sin(x))(1 + 2sin(x))

Front

How do you factor cos²(x) - cos(x) - 6?

Back

(cos(x) - 3)(cos(x) + 2)

Front

What is the value of cos(θ) if cos(-θ) = ⅓?

Back

cos(θ) = ⅓

Front

What is the value of sin(-x)/cos(-x)?

Back

-tan(x)