$\cos^2(\theta)-\sin^2(\theta)=1+\sin(\theta)$ over the interval $0<\theta<2\pi$
Find the trigonometric identity.
Apologize for the confusion, first time using this resource didnt read the instructions. i have tried manipulating the equation by substituting x^2 and y^2 in for the cos^2 and sin^2 and subtracting and adding the one but i could not find out what identities to use to make both side equal. Sorry again for the mistake.