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Sangeeth
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June 14, 2017 at 5:54pm
Little Sky
:
Question 11: ans => (a) 0 [deqn]\sin^{-1}(2x-1)+\csc^{-1}(2x-1) = 0\\ \sin^{-1}(X)+\csc^{-1}(X) = 0\\ \sin^{-1}(X)=-\csc^{-1}(X)\\ \sin^{-1}(X)=\csc^{-1}(-X)\\ \sin^{-1}(X)=\sin^{-1}(1/(-X))\\ X = -1/X\\ -X^2=1\\ 0=1+X^2\\ 1+(2x-1)^2=0\\ 1+4x^2-4x+1=0\\ 4x^2-4x+2=0\\ 2x^2-2x+1=0\text{ (No Real Root)}[/deqn]
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June 15, 2017 at 3:56pm
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