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    LeesLees's Avatar
    LeesLees Posts: 1, Reputation: 1
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    #1

    Oct 19, 2011, 07:38 PM
    verifying trigonometric identities solver?
    Verify that (1-(cosx- sinx)^2)/cosx=2sinx
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Oct 20, 2011, 05:53 AM
    If you multiply out the (cosx - sinx)^2 part, you can then apply the identity cos^2x+sin^2x=1. It falls right out from there.
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    alpha2618bit Posts: 1, Reputation: 1
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    #3

    May 1, 2012, 07:09 PM
    sin^2*(1+cot^2)=1
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    ebaines Posts: 12,131, Reputation: 1307
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    #4

    May 2, 2012, 05:40 AM
    Convert the cotangent function to cos/sin - it's straight forward from there.
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