Question 1194262
<br>
(1) The right side of your equation is {{{1-Tan^2(x)/ 1+Tan^2(x)}}}<br>
I don't think that is what you meant.  Use parentheses where needed.<br>
(2) "help me solve this problem" doesn't tell us what the problem is.<br>
As it is, it appears there are three variables in the equation -- alpha, beta, and x -- so it would appear there are infinitely many solutions to the equation.<br>
If you want help with this, re-post, presenting the problem clearly and correctly....<br>