Trig identities precalculus

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Pre-Calculus

AP Precalculus

Unit 3: Trigonometric and Polar Functions

Trig identities

trigonometry

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5 Terms

1
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Sin(2x)

2sin(x) • cos(x)

2
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cos(2x) main stem

cos²(x) - sin²(x)

3
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cos(2x) 2nd identity

2cos²(x)-1

4
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cos(2x) 3rd identity

1-2sin²(x)

5
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tan(2x)

(2tan(x)) / (1 - tan²(x))