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निम्नलिखित को सिद्ध कीजिए । `int_(0)^(1)sin^(-1)xdx=(pi)/(2)-1` |
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Answer» माना `x=sin theta` `rArr " "dx=cos theta d theta` `x = 0` पर `" "sin theta=0" "rArr" "theta=0` `x=1` पर `" "sin theta=1" "rArr" "theta=pi//2` `therefore int_(0)^(1)sin^(-1)xdx=int_(0)^(pi//2)theta. cos theta d theta` `" "=[theta sin theta]_(0)^(pi//2)-int_(0)^(pi//2)1.sin theta d theta` `" "=(pi)/(2)-0+[cos theta]_(0)^(pi//2)` `" "=(pi)/(2)+cos.(pi)/(2)-cos 0` `" "=((pi)/(2)-1)" "` यही सिद्ध करना था । |
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