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24 August, 08:42

Factor the algebraic expression below in terms of a single trigonometric function cos x - sin 2x - 1

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  1. 24 August, 09:09
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    Cos x - sin² x - 1 =

    = cos x - (cos² x - 1) - 1 =

    = cos x - cos² x + 1 - 1 =

    = cos x - cos² x =

    = cos x · (1 - cos x)
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