RD Sharma Solutions Class 12 Maths Chapter 19 Ex 19
1- sin2x 1 - cos 2x cos2x = 1- 2sin2 x 1- sin2x - sin2x 21 21 21 2sinx cosx 2sin2x cos x - cot x dx 2 sin2 x cosec x cosec 2 x cosec x cosec2xdx - cotxdx — cosec2xdx and I That is 1=11 + 12, where, 11 - cot xdx Consider 11 - — cosec2xdx Take as the first funcbcn and cosec x as the second function. ................
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