2×5^{2} if you don't understand its 2 times 5 to the second power.
Because when you divide you get the same answer or something to do with percents
If you're using the app, try seeing this answer through your browser: brainly.com/question/2787701_______________

Square both sides:


Since

is positive, you can discard the negative sign. So,

Substitute this value back into

to find


I hope this helps. =)
Tags: <em>trigonometric identity relation trig sine cosine tangent sin cos tan trigonometry precalculus</em>