The equation is not clear. Please re-post it. Ideally, learn some basic latex before re-posting: http://www.mathhelpforum.com/math-he...-tutorial.html
The equation is not clear. Please re-post it. Ideally, learn some basic latex before re-posting: http://www.mathhelpforum.com/math-he...-tutorial.html
Guessing it is
Use the following identities: , and
Now observe that is a quadratic in . Solve the equation and discard the negative root. And then the solution to the original equation is the positive square root of the root.
Can you work out the details and post your answer?
Good luck