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30 October, 14:40

Is sinx cosx ever equal to 1?

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  1. 30 October, 14:57
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    From Pythagorean Identities sin^2 x + cos^2 x = 1

    and from that identities we can have sinx + cosx = 1, taking sinx = 1 - cosx and substitute in the equation

    sinx + cosx = 1

    (1 - cosx) + cosx = 1

    Remove the parenthesis

    1 - cosx + cosx = 1

    cancel cosx

    1=1
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