Trigonometric Identities

Front

What is the identity for (secθ-1)(secθ+1)?

Back

tan²θ

Front

What is cscx - cotx equal to?

Back

(1 - cosx) / sinx

Front

What is the result of cos²θ(1 + cot²θ)?

Back

cot²θ

Front

Simplify tanx/sinx + secx.

Back

2secx

Front

What is sec18°tan18°cos18°cot18°?

Back

1

Front

Define secant (secθ).

Back

Secant is the reciprocal of cosine: secθ = 1/cosθ.

Front

Define cosecant (cscx).

Back

Cosecant is the reciprocal of sine: cscx = 1/sinx.

Front

What is the Pythagorean identity involving sine and cosine?

Back

sin²θ + cos²θ = 1.

Front

What is the relationship between tangent and sine/cosine?

Back

tanθ = sinθ/cosθ.

Front

What is the identity for cotangent in terms of sine and cosine?

Back

cotθ = cosθ/sinθ.