Trig Identities and Law of sines and Cosines

Which of the following is NOT a Pythagorean identity?

• sin²θ
• cosθ
• tanθ
• 1- sin²θ

• -1
• sin θ
• csc θ
• 1

• 1/cos x
• 1
• cot x
• -1

• sin²θ
• cosθ
• tanθ
• 1- sin²θ

• 1

*

• cos x
• csc x
• sec x
• cot x

*

• csc x
• sec x
• cot x
• tan x