a. Apply the formula for cos (A - B) to the identity sin = cos(/2 -
Question:
a. Apply the formula for cos (A - B) to the identity sin θ = cos(π/2 - θ) to obtain the addition formula for sin (A + B).
b. Derive the formula for cos (A + B) by substituting -B for B in the formula for cos (A - B) from Exercise 35.
Exercise 35.
Use the addition formulas to derive the identities.
cos (A - B) = cos Acos B + sin Asin B
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a Applying the formula for cos A B to the identity sin cos2 we have co...View the full answer
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Related Book For 
Thomas Calculus Early Transcendentals
ISBN: 9780321884077
13th Edition
Authors: Joel R Hass, Christopher E Heil, Maurice D Weir
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