If $A = 130^\circ $ and $x = \sin A + \cos A,$ then
$x > 0$
$x < 0$
$x = 0$
$x \le 0$
If $\cos \theta = \frac{1}{2}\left( {x + \frac{1}{x}} \right)$, then $\frac{1}{2}\left( {{x^2} + \frac{1}{{{x^2}}}} \right) = $
Find the value of the trigonometric function $\sin \left(-\frac{11 \pi}{3}\right)$
Find the radian measures corresponding to the following degree measures:
$-47^{\circ} 30^{\prime}$
If $\sec \theta + \tan \theta = p,$ then $\tan \theta $ is equal to
If $\tan x=\frac{3}{4}, \pi < x < \frac{3 \pi}{2},$ find the value of $\sin \frac{x}{2}, \cos \frac{x}{2}$ and $\tan \frac{x}{2}$