# Odd and even Identities

## Reference > Algebra: Trigonometric Identities

 Description$$\sin{(-x)}=-\sin{x}$$ $$\cos{(-x)}=\cos{x}$$ $$\tan{(-x)}=-\tan{x}$$ $$\csc{(-x)}=-\csc{x}$$ $$\sec{(-x)}=\sec{x}$$ $$\cot{(-x)}=-\cot{x}$$