Question

Express the given product as a sum containing only sines or cosines. sin (9?) sin (4?) sin (9?) sin (4?) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

          Express the given product as a sum containing only sines or cosines.
sin (9?) sin (4?)
sin (9?) sin (4?) = 
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

$Express the given product as a sum containing only sines or cosines. sin (9?) sin (4?) sin (9?) sin (4?) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)$

Added by -Ngeles Q.

Precalculus with Limits

Ron Larson 2nd Edition

Instant Answer

Solved by Expert Gregory Higby

05/07/2022

Step 1

Step 1: Identify the formula for sine times sine, which is 1/2(cos(θ1 - θ2) - cos(θ1 + θ2)). Show more…

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Express the given product as a sum containing only sines or cosines. sin (9θ) sin (4θ) sin (9θ) sin (4θ) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)