M3MORIZ3: TRIG ID3NTITI3S

Front

What is the identity for sin(-𝜃)?

Back

sin(-𝜃) = -sin𝜃

Front

What does 1 - tanA tanB equal to when divided by tanA + tanB?

Back

cot(A + B) = (1 - tanA tanB) / (tanA + tanB)

Front

What is the cosine addition formula?

Back

cosAcosB + sinAsinB = cos(A + B)

Front

What is the half-angle identity for tangent?

Back

tan(𝜃/2) = ±√[(1 - cos𝜃) / (1 + cos𝜃)]

Front

What is the identity for tan(-𝜃)?

Back

tan(-𝜃) = -tan𝜃

Front

What is the sine addition formula?

Back

sin(A + B) = sinAcosB + cosAsinB

Front

What is the cosine subtraction formula?

Back

cos(A - B) = cosAcosB + sinAsinB

Front

What is the tangent addition formula?

Back

tan(A + B) = (tanA + tanB) / (1 - tanAtanB)

Front

What is the identity for cos(-𝜃)?

Back

cos(-𝜃) = cos𝜃

Front

What is the identity for sin(𝜃 + 90°)?

Back

sin(𝜃 + 90°) = cos𝜃