SOLUTION: Please help. How can I prove the identity? Is there any online calculator for trig identity? Thank you. 2cscx=tan(1/2)x+cot(1/2)x How to prove the identity?

There is no online calculator that will solve identities
like this:



Let's get the right tools:

There are two formulas for 

which don't involve square roots.  They are:



and



and since the cotangent is the reciprocal of the tangent, we can
make two formulas from them for 



and  



Let's pick two of them for the right side of the identity which
have the same denominator so they'll be easy to add.  Pick the 
ones with sin(x) denominators to substitute in the right side 
of the identity, which is:



Substituting:















Edwin