Упростите выражение
[tex]\displaystyle
\frac{1}{1+\cos \alpha }-\frac{1}{1-\sin \alpha }\\\frac{2\sin^2 \alpha -1}{\sin \alpha +\cos \alpha } [/tex]
[tex]\displaystyle
\frac{1}{1+\cos \alpha }-\frac{1}{1-\sin \alpha }\\\frac{2\sin^2 \alpha -1}{\sin \alpha +\cos \alpha } [/tex]
Answers & Comments
Verified answer