You can
put this solution on YOUR website!
Remember that
Also, we have another identity:
+\cos^2(x)=1)
which means that
=\frac{\sin(x)}{\cos(x)})
... Start with the first identity.
=\frac{\sqrt{1-\cos^2(x)}}{\cos(x)})
... Plug in
}}{\cos(x)})
... Plug in
Now let

... Replace each cosine with 'z'
I'm going to let you take it from here. You just need to solve for 'z' and then use the equation

to find 'x'. Let me know if you still need help.