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`int secx tanx sqrt(4 sec^(2)x-1)dx` का मान ज्ञात कीजिए । |
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Answer» `int sec x tan x sqrt(4 sec^(2)x-1)dx` `=int sec x tanx sqrt((2secx)^(2)-1^(2))dx` `=intsqrt(t^(2)-1^(2))(dt)/(2)" "{:(" माना "2sec x=t),(therefore" "2 sec x tanx=(dt)/(dx)),(therefore" "sec x tanx dx =(dt)/(2)):}` `=(1)/(2)[(t)/(2)sqrt(t^(2)-1)-(1)/(2)log|t+sqrt(t^(2)-1)|]+c` `=(1)/(4)[2 secxsqrt(4 sec^(2)x-1)-log|2secx+sqrt(4sec^(2)x-1)|]+c` |
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