Trigonometric Identities

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Some of the formulas from the OpenStax PreCalculus 2e Chapter 7 Key Equations.

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12 Terms

1
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Pythagorean Identities (3)

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2
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Even-odd identities (remember the odd ones) (6)

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3
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Reciprocal identities (6)

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4
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Quotient identities (2)

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5
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<p>Sum and Difference Formula for Cosine (2)</p>

Sum and Difference Formula for Cosine (2)

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6
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<p>Sum and Difference Formula for Sine (2)</p>

Sum and Difference Formula for Sine (2)

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7
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<p>Sum and Difference Formula for Tangent (2)</p>

Sum and Difference Formula for Tangent (2)

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8
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Cofunction identities (6)

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9
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<p>Double angle formula for sine (1)</p>

Double angle formula for sine (1)

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10
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<p>Double angle formulas for cosine (3)</p>

Double angle formulas for cosine (3)

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11
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<p>Double angle formula for tangent (1)</p>

Double angle formula for tangent (1)

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12
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<p><strong>Half-angle formulas (3)</strong></p>

Half-angle formulas (3)

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