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19 January, 10:25

Where do I start? cotx/secx=cscx-sinx

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  1. 19 January, 11:45
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    Always try to find a way to convert cotx, secx, cscx, and tanx into cosx and sinx

    cotx (1/secx) = (1/sinx) - sinx

    (cosx/sinx) (cosx) = (1/sinx) - sinx

    cos²x / sinx = (1 - sin²x) / sinx

    cos²x = 1 - sin²x

    sin²x + cos²x = 1
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