The number of real solution of tan-1 Vx(x + 1) + sin-1 Vx²+x+1= 2 is-

The number of real solutions of sin(e^x) = e^1 + e^(-1) is

The number of real solutions of : tan^(-1) sqrt(x(x+1))+sin^(-1) sqrt(x^2+x+1)=pi/2 is :

The number of real solutions of tan^(-1)sqrt(x(x+1))+sin^(-1)sqrt(x^(2)+x+1)=(pi)/(2) is

The number of real solutions of tan^(-1)sqrt(x(x+1))+sin^(-1)sqrt(x^2+x+1)=pi/2 is

The number of real solutions of tan^(-1)sqrt(x(x+1))+sin^(-1)sqrt(x^2+x+1)=pi//2 a)0 b)1 c)2 d) oo

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