Trig Identities (BASIC)

Front

What is the Pythagorean identity for sine and cosine?

Back

sin²θ + cos²θ = 1

Front

What is the definition of secant (sec)?

Back

secθ = 1/cosθ

Front

What is the definition of cosecant (csc)?

Back

cscθ = 1/sinθ

Front

What is the definition of tangent (tan)?

Back

tan(x) = sin(x)/cos(x)

Front

What is the relationship between cotangent (cot) and tangent (tan)?

Back

cot(x) = 1/tan(x) = cos(x)/sin(x)

Front

What is the value of sin²θ in terms of cos²θ?

Back

sin²θ = 1 - cos²θ

Front

What is the value of cos²θ in terms of sin²θ?

Back

cos²θ = 1 - sin²θ

Front

What is the identity for csc²θ?

Back

csc²θ = 1 + cot²θ

Front

What is the identity for sec²θ?

Back

sec²θ = 1 + tan²θ

Front

What is the relationship between the sides of a right triangle for sine?

Back

sinθ = opposite/hypotenuse