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22 May, 05:00

Verify cotx/secx=1/sinx-sinx

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  1. 22 May, 05:16
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    Cot=cos/sin

    sec=1/cos

    cosx/sinx:1/cosx=

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

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