Sum and Difference Identities Flashcards

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Flashcards for trigonometry lecture notes, focusing on sum and difference identities.

Geometry & Trigonometry

Right Triangles & Trigonometry

Last updated 4:32 PM on 5/3/25

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Sum Identity for Sine

sin(A + B) = sinAcosB + cosAsinB

2

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Difference Identity for Sine

sin(A - B) = sinAcosB - cosAsinB

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Sum Identity for Cosine

cos(A + B) = cosAcosB - sinAsinB

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Difference Identity for Cosine

cos(A - B) = cosAcosB + sinAsinB

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Sum Identity for Tangent

tan(A + B) = (tanA + tanB) / (1 - tanAtanB)

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Difference Identity for Tangent

tan(A - B) = (tanA - tanB) / (1 + tanAtanB)