Review Fundamental Trig Identities

Fill in the blank:

cot(x) = cos(x) / _____

• sin(x)

• cos(x)

• tan(x)

• csc(x)

Fill in the blank:

tan(x) = sin(x) / _____

• sin(x)

• cos(x)

• sec(x)

• csc(x)

What is the reciprocal function of cos(x)?

• sin(x)

• cot(x)

• csc(x)

• sec(x)

• csc²θ
• sec²θ
• cscθ
• 1

• cot Θ

• cos Θ

• tan^-1 Θ

• csc Θ

*

• csc x

• sec x

• cot x

• tan x

Simplify: (1- cosΘ) (1+cos Θ)

• sin²θ

• cot²θ

• tan²θ

• cos²θ

Solve the following for tan²θ:
1 + tan²θ = sec²θ 

• tan²θ = sec²θ + 1

• tan²θ = sec²θ - 1

• tanθ = secθ - 1

• tan²θ = opp/adj

• Converting all functions to sine and cosine

• Using the Pythagorean identity

• Applying the sum and difference identities