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Answer» Let sin^-1(1-x) = A So Sin A = 1-xlet Sin^-1 x = B So Sin B = x Given A - 2 * B =π/2 A - π/2 =2B Cos (A -π/2) = Cos (2 B) SinA = 1 - 2 Sin² B 1 - x = 1 - 2 x² 2 x² - x = 0 x = 0 or x = 1/2 |
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