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Continue reading# Month: April 2021

## sin 3a (formula and example) (sine of triple angle) (trigonometry) (handwritten)

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Continue reading## tan (-a) (formula and example) (tangent of negative angle) (trigonometry) (handwritten)

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Continue reading## cos (-a) (formula and example) (cosine of negative angle) (trigonometry) (handwritten)

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Continue reading## sin (-a) (formula and example) (sine of negative angle) (trigonometry) (handwritten)

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Continue reading## tan 2a (formula and example) (tangent of double angle) (trigonometry) (handwritten)

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