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26 February, 18:00

2cos2ysin2y

simplify

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Answers (1)
  1. 26 February, 18:32
    0
    Reorder 2 cos (2y) and sin (2y)

    = sin (2y) (2 cos (2y))

    Remove parenthesis

    = sin (2y) * 2 cos (2y)

    Reorder sin (2y) and 2

    = 2 * sin (2y) cos (2y)

    Apply the sine double-angle identity

    = sin (2 (2y))

    Now multiply 2 by 2

    = sin (4y)
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