prove that : tan [pi/4 + 1/2 cos^{-1} a/b] + tan[pi/4 - 1/2cos^{-1} a/b] = 2b/a Share with your friends Share 86 Ajanta Trivedi answered this the LHS part of the equation is:hope this helps you. 420 View Full Answer Rishabh Tripathi answered this If the question is to prove , then the solution is shown below: 95 Aakshita Malhotra answered this thanx a lot !! -34