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Úprava matematického výrazu
Uprav následující výraz:
\( \large \Large \frac{\cos x+\cos y}{\sin x-\sin y}\large \)
\( \large \Large \frac{\cos \left( \frac{x-y}{2} \right) }{\sin \left( \frac{x-y}{2} \right) }\large = \tan \left( \Large \frac{x-y}{2}\large \right) \)
\( \large \Large \frac{\cos \left( \frac{x-y}{2} \right) }{\sin \left( \frac{x+y}{2} \right) }\large = \cotg \left( \Large \frac{x-y}{2}\large \right) \)
\( \large \Large \frac{\cos \left( \frac{x+y}{2} \right) }{\sin \left( \frac{x-y}{2} \right) }\large = \cotg \left( \Large \frac{x-y}{2}\large \right) \)
\( \large \Large \frac{\cos \left( \frac{x-y}{2} \right) }{\sin \left( \frac{x-y}{2} \right) }\large = \cotg \left( \Large \frac{x-y}{2}\large \right) \)