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akshi
Questions (2)
cos x ^sin x^cos x^sin x^cos x..........=2+2 sec^2 x*tan^2 x-sec^4 x- tan^4 x find x
1 answer
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(1+x)^20 + x(1+x)^19 + x^2 (1+x)^18 +....+ x^18 (1+x). prove that the coefficient of x^18 is 1330
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