Question: Express cos(A+ B + C) in terms of sin A, sin B, sin C, cos A, cos B, and cos C.

Express cos(A+ B + C) in terms of sin A, sin B, sin C, cos A, cos B, and cos C.

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We can use the trigonometric identity for the cosine of a sum cosA B C cosA BcosC sinA BsinC Now we ... View full answer

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