Trig Identities

Front

What happens when you multiply two reciprocal functions?

Back

It equals 1.

Front

tanθ = ?

Back

sinθ/cosθ.

Front

cscθ = ?

Back

1/sinθ.

Front

cotθ = ? (in terms of sin and cos)

Back

cosθ/sinθ.

Front

cotθ = ? (in terms of tan)

Back

1/tanθ.

Front

What is the Pythagorean identity involving sin and cos?

Back

sin²θ + cos²θ = 1.

Front

What is the definition of secθ?

Back

secθ = 1/cosθ.

Front

What is the definition of cscθ?

Back

cscθ = 1/sinθ.

Front

What is the definition of cotθ?

Back

cotθ = 1/tanθ.

Front

What is the quotient identity for tanθ?

Back

tanθ = sinθ/cosθ.