Для любых углов \(\displaystyle \alpha\) и \(\displaystyle \beta\) верно

\(\displaystyle \sin(\alpha+\beta)=\sin(\alpha)\cos(\beta)+\cos(\alpha)\sin(\beta){ \small ,}\)

\(\displaystyle \cos(\alpha+\beta)=\cos(\alpha)\cos(\beta)-\sin(\alpha)\sin(\beta){\small .}\)