Trig Identities

Front

What is the definition of tanθ?

Back

tanθ = sinθ / 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 definition of secθ?

Back

secθ = 1 / cosθ

Front

What happens when you multiply two reciprocal functions?

Back

It equals 1

Front

What is the relationship between sinθ and cscθ?

Back

cscθ is the reciprocal of sinθ.

Front

What is the relationship between cosθ and secθ?

Back

secθ is the reciprocal of cosθ.

Front

What is the relationship between tanθ and cotθ?

Back

cotθ is the reciprocal of tanθ.

Front

What is the Pythagorean identity involving sin and cos?

Back

sin²θ + cos²θ = 1

Front

What is the identity for sin(θ + φ)?

Back

sin(θ + φ) = sinθ cosφ + cosθ sinφ