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Write 4 sin(3x) cos (2x) as a sum or difference

User Dawnoflife
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1 Answer

5 votes

Answer:

2sin(x) + 2sin(5x)

Explanation:

4sin(x)cos(2x)

=4sin(2x+x)cos(x+x) = 4[sin(2x)cos(x)+cos(2x)sin(x)]

= 4sin(2x)cos(x) + 4sin(x)cos(2x)

= 4sin(x+x)cos(x) + 4sin(x)cos(x+x)

= 2sin(x) + 2sin(5x)

User YMMD
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