trigonometri-ucgen

\[\sin(A \pm B)=\sin A\cdot\cos B \pm \cos A \cdot\sin B\]
\[\cos(A \pm B)=\cos A \cdot\ cos B \mp \sin A \cdot\ sin B\]
\[\tan(A \pm B)=\frac{ \tan A \pm \tan B } { 1 \mp \tan A \cdot \tan B }\]
\[\cot(A \pm B)=\frac{ \tan A \pm \tan B } { 1 \mp \tan A \cdot \tan B }\]
\[\cot(A \pm B)=\frac{ \cot A \cdot \cot B \mp 1 } { \cot B \pm \cot A }\]