Question

Express the given product as a sum containing only sines or cosines. sin (5?) sin (3?) sin (5?) sin (3?) = (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 (5?) sin (3?)
sin (5?) sin (3?) =
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

$Express the given product as a sum containing only sines or cosines. sin (5?) sin (3?) sin (5?) sin (3?) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)$

Added by Tara M.

Introductory and Intermediate Algebra for College Students 4th

Robert Blitzer 4th Edition

Instant Answer

Solved by Expert Kathleen Carty

08/14/2022

Step 1

sin(50)sin(30)sin(50)sin(30) = (1/2)(cos(50-30) - cos(50+30))(1/2)(cos(50-30) - cos(50+30)) = (1/4)(cos(20) - cos(80))(cos(20) - cos(80)) Now, we can use the identity cos(A)cos(B) = (1/2)(cos(A-B) + cos(A+B)) to simplify further. (1/4)(cos(20) - Show more…

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Express the given product as a sum containing only sines or cosines. sin (5̸) sin (3̸) sin (5̸) sin (3̸) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)