# CBSE Class 12

If tan-1 x - 1/x - 2 + tan-1 x + 1 / x + 2 = π/4, then find the value of x
[CBSE Class 12 Maths]
(2)

Find the values of tan1/2[sin-1 2x/1+x2 + cos-1 1-y2/1+y2], |x| < 1, y > 0 and xy < 1
[CBSE Class 12 Maths]
(2)