Given: Value of y = sec-1\(\left(\cfrac{\text x+1}{\text x-1}\right)\) + sin-1\(\left(\cfrac{\text x-1}{\text x+1}\right),\)
sec-1(x + 1)/(x - 1) + sin-1(x - 1)/(x + 1)
To Prove: dy/dx = 0
The formula used: (i) cos θ = sin\(\left(\cfrac\pi2-\theta\right)\)