Review Trig Identities by variablepitch342

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									Trigonometry Trigonometric Identities: Review Trig Identities – Homework 1 Simplify each of the following expressions: 1. csc 2 x tan 2 x + csc 2 x 2. cos2 x 1 + sin x

sec 2 x − 1 3. sec2 x 4. sec x cos (90° − x ) 5. cot 2 x sin2 x + tan2 x cos2 x

Other Problems: 1. Find the exact value of cos 75° using a sum or difference identity. 2. Find the exact value of tan165° using a sum or difference identity. 3. Find the exact value of sin
17 π using a sum or difference angle identity. 12

4. Derive an identity for cos3θ .


								
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