\( \frac { 1 - 2 \cos A \cdot \sin A } { \cos ^ { 2 } A - \sin ^ { 2 } A } = 2 - \sqrt { 3 } \)

Simplify the following expressions \( 6.1 \quad \frac{\sin 210^{\circ} \cos 300^{\circ} \tan 240^{\circ}}{\cos 120^{\circ} \tan 150^{\circ} \sin 330^{\circ}}\left[\begin{array}{l}{[\sin (-\theta)+\cos (360-\theta)]}\end{array}\right. \) If \( \tan x=m+\frac{1}{m}, 90^{\circ} \leq \) Calculate the value of \( x \)

تعریف کتانژنت چیست و چگونه با مثلث راست مرتبط است؟

\( 5.1 . \frac { \sin 210 ^ { \circ } \cos 300 ^ { \circ } \tan 240 ^ { \circ } } { \cos 120 ^ { \circ } \tan 150 ^ { \circ } \sin 330 ^ { \circ } } \)

\( \frac{\cos \theta \csc \theta}{\tan \theta} \) أي مما يأتي يكانئ العبارة

What is the definition of the tangent function in relation to a right triangle?