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14 January, 10:59

Cosxsinx-2cosx=0

I dont know how to solve this

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Answers (1)
  1. 14 January, 12:29
    0
    Factor out cosx: cosx (sinx-2) = 0

    cosx=0 or sinx-2=0

    cosx=0 or sinx=2

    the largest value of sinx is 1, sinx will never be 2, so cosx=0, x=π/2 or 3π/2 are the two answers.
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