M3MORIZ3: TRIG ID3NTITI3S

Front

What is the value of sec(-𝜃)?

Back

sec(-𝜃) = sec𝜃

Front

What does tanA - tanB / (1 + tanA tanB) equal?

Back

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

Front

What is sinAcosB - cosAsinB equal to?

Back

sin(A - B) = sinAcosB - cosAsinB

Front

What is the formula for sin(𝜃/2)?

Back

sin(𝜃/2) = ±√((1 - cos𝜃)/2)

Front

What does 1 - 2sin²𝜃 equal?

Back

cos2𝜃 = 1 - 2sin²𝜃

Front

What is the definition of secant?

Back

sec(𝜃) = 1/cos(𝜃)

Front

What is the definition of tangent?

Back

tan(𝜃) = sin(𝜃)/cos(𝜃)

Front

What is the Pythagorean identity for sine and cosine?

Back

sin²(𝜃) + cos²(𝜃) = 1

Front

What is the double angle formula for sine?

Back

sin(2𝜃) = 2sin(𝜃)cos(𝜃)

Front

What is the double angle formula for cosine?

Back

cos(2𝜃) = cos²(𝜃) - sin²(𝜃)