- #1
Draggu
- 102
- 0
Homework Statement
Prove the following identity:
cos2A/1 + sin2A = cotA - 1 / cotA + 1
Homework Equations
The Attempt at a Solution
I proved the right side, which eventually lead up to cosA - sinA / cosA + sinA
I have NO idea how to do the left side. I have wasted roughly 10-15 sheets of paper now trying to prove it, but it all leads up to nothing. I tried MANY different solutions...