trig

sinx+sinxcot^2x=cscx
prove each identity

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  1. sinx + sinxcot^2x = sinx (1 + cot^2x)
    = sinx*(sin^2+cos^2)/sin^2
    = 1/sinx
    = csc x

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  2. LS = sinx(1 + cot^2x)
    = sinx(csc^2x)
    = sinx(1/sin^2x)
    = 1/sinx
    = cscx
    = RS

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