Question 728482
(cscO + cotO)(cscO - cotO) = 1
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You have the form: (a+b)(a-b) = a^2-b^2
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(csc^2 - cot^2) = 1
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((1/sin^2) - (cos^2/sin^2) = 1
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(1-cos^2)/sin^2 = 1
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sin^2/sin^2 = 1
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1 = 1
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Cheers,
Stan H.