Precalculus Trig Identities

Simplify

• secθ

• cos²θ

• sin²θ

Simplify:  tanxcotx-cos²x

• tanx

• cotx

• sin²x

• cos²x

Simplify this to a basic trigonometry function:
tan(x)csc(x) 

• tanx

• secx

• cotx

• cscx

Verify the following:

• cos²x

• sin²x

• cot²x

• tan²x

Simplify.

• sin x

• cos x

• tan x

• 1

Which of the following is not a pythagorean identity?

• cot²x + 1 = csc²x

• csc²x + 1 = cot²x

• cot²x - csc²x = -1

• csc²x - cot²x = 1

Simplify.

• sinθ

• cos²θ

• sin²θ

• 1- sin²θ

sec x =

• 1/cosx

• 1/sinx

• 1/cscx

• 1/tanx

sin²x + cos²x =

• 1

• 1/sinx

• sec²x

• csc²x