Djejdi Trig Identities Final

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Last updated 1:30 AM on 6/12/26

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1

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Double angle Formulas

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Sin 2θ

2sinθ * cosθ

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Cos2θ

cos²θ - sin²θ

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Tan2θ

2tanθ/1-tan²θ

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Power Reducing Formulas

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Sin²θ

1-cos2θ/2

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Cos²θ

1+cos2θ/2

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Tan²θ

1-cos2θ / 1 +cos2θ