Question 368957
(2sec^2)x-(2sec^2)x(sin^2)x-(sin^2)x-(cos^2)x=1
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2sec^2 - 2sec^2*sin^2 -[sin^2+cos^2] = 1
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2sec^2[1-sin^2] - 1 = 1
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2sec^2[cos^2] = 2
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2(1) = 2
2 = 2
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Cheers,
Stan H.