±2πの公式

\(\sin{(x+2\pi )}=\sin{x}\)

\(\cos{(x+2\pi )}=\cos{x}\)

\(\tan{(x+\pi )}=\tan{x}\)

\(\csc{(x+2\pi )}=\csc{x}\)

\(\sec{(x+2\pi )}=\sec{x}\)

\(\cot{(x+\pi )}=\cot{x}\)