prove that :

tan [pi/4 + 1/2 cos-1 a/b] + tan[pi/4 - 1/2cos-1 a/b] = 2b/a

the LHS part of the equation is:

hope this helps you.

  • 420

If the question is to prove , then the solution is shown below:

  • 95

thanx a lot !!

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