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7 February, 12:18

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

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  1. 7 February, 15:21
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    2sin (x) + 2sin (5x)

    Step-by-step 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)
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