Chapter 3 - Trigonometry Flashcards by Zeeshan Yousuf | Brainscape

Q

What are the two trigonometric identities?

A

The two trigonometric identities are:

sin²(θ) + cos²(θ) ≡ 1
tan(θ) ≡ sin(θ)/cos(θ)

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Q

State the cosine rule.

A

a² = b² + c² - 2bc cosA

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Q

How do you calculate the area of a triangle using sine?

A

Area of a triangle = ½absinC

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