The number of real solutions of tan^(-1)...

The number of real solutions of `tan^(-1)sqrt(x(x+1))+sin^(-1)sqrt(x^2+x+1)=pi/2` is a.`z ero` b. one`` c. two d. infinite

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if 0 lt x lt 1 then tan^(-1)= sqrt(1-x^2)/(1+x^2) is equal to (i) 1/...
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The number of real solutions of tan^(-1)sqrt(x(x+1))+sin^(-1)sqrt(x^2+...
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