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March 26, 2017

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prove:(cscx-cotx)^4 x (cscx+cotx)^4 = 1

  • Trigonometry - ,

    LS
    = [(cscx - cotx)(cscx + cotx)]^4
    = [csc^2x - cot^2x]^4
    = [1 + cot^2x - cot^2x]^4
    = [1]^4
    = 1
    = RS

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