Trig Identities

Front

What is the Pythagorean Identity for secant?

Back

sec² x = 1 + tan² x

Front

Simplify: (secx-1)(secx+1).

Back

tan² x

Front

According to the negative angle identities, what is cos(-y)?

Back

cos(y)

Front

Simplify: 1 - sin²θ.

Back

cos²θ

Front

According to the tangent and cotangent identities, what is tan x?

Back

tan x = sin x / cos x

Front

What is the Pythagorean Identity for cosecant?

Back

csc² x = 1 + cot² x

Front

What is the relationship between sine and cosine?

Back

sin² x + cos² x = 1

Front

What is the value of sin(90° - x)?

Back

cos x

Front

What is the value of cos(90° - x)?

Back

sin x

Front

What is the double angle formula for sine?

Back

sin(2x) = 2sin x cos x