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

Prove that 1 + tan²x / (cscx secx) = ?

Back

sinx/cosx

Front

What is sec²θ - tan²θ?

Back

1

Front

What is sec18°tan18°cos18°cot18° equal to?

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

sin²x + cos²x = 1.

Front

What is the relationship between secant and tangent?

Back

sec²θ = 1 + tan²θ.

Front

What is the relationship between cosecant and cotangent?

Back

csc²x = 1 + cot²x.