# Periodicity Identities

## Reference > Algebra: Trigonometric Identities

 Description$$\sin{(x+2\pi )}=\sin{x}$$ $$\cos{(x+2\pi )}=\cos{x}$$ $$\tan{(x+\pi )}=\tan{x}$$ $$\csc{(x+2\pi )}=\csc{x}$$ $$\sec{(x+2\pi )}=\sec{x}$$ $$\cot{(x+\pi )}=\cot{x}$$