Evaluate \( \frac{\cos 45^{\circ}}{\sec 30^{\circ}+\operatorname{cosec} 30^{\circ}} \)

iven that \( \cos \left(\frac{1}{2} x+10^{\circ}\right)-\sin \left(x+20^{\circ}\right)=0 \) find \( \tan x \)

The least positive coterminal angle is: A. \( 659^{\circ} \) B. \( 481^{\circ} \) C. \( 478^{\circ} \) D. \( 448^{\circ} \)

iven that \( \operatorname{Cos}\left(\frac{1}{2} x+10^{\circ}\right)-\operatorname{Sin}\left(x+20^{\circ}\right)=0 \) find \( \tan x \)

\( [ \sin ( - \theta ) + \cos ( 360 - \theta ) ] [ \cos ( 90 - \theta ) + \frac { \sin \theta } { \tan \theta } ] \)

6. 1рыюнометриялық орнекті ықшамданыз: \( 1-2 \sin ^{2} x \)