Trigonometry

verify the identity:

1- (cos^2x)/(1-sinx)= -sinx

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asked by Sean
  1. I already did this today, scroll down

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    posted by Damon
  2. verify the identity:

    1-cos^2x/1-sinx= -sinx

    Trigonometry - Damon, Monday, May 30, 2011 at 6:43pm

    assume you mean (this took some serious detective work - please be careful with parentheses)

    1- (cos^2x)/(1-sinx)= -sinx
    cos^2x = 1 - sin^2 x
    so we have
    1 - (1-sin x)(1+sin x)/(1-sin x) = -sin x

    1 - (1+sin x) = -sin x

    1 - 1 - sin x = -sin x

    -sin x = -sin x

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    posted by Damon

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