Find the degree measures corresponding to the following radian measures (Use $\pi=\frac{22}{7}$ ).
$-4$
We know that $\pi$ radian $=180^{\circ}$
$-4$ radian $=\frac{180}{\pi} \times(-4)$ degree
$=\frac{180 \times 7(-4)}{22}$ degree
$=\frac{-2520}{11}$ degree $=-229 \frac{1}{11}$ degree
$=-229^{\circ}+\frac{1 \times 60}{11}$ minutes $\left[1^{\circ}=60^{\prime}\right]$
$=-229^{\circ}+5^{\prime}+\frac{5}{11}$ minutes
$=-229^{\circ} 5^{\prime} 27^{\prime \prime} \quad\left[1^{\prime}=60^{\prime \prime}\right]$
If $\cos x + {\cos ^2}x = 1,$ then the value of ${\sin ^2}x + {\sin ^4}x$ is
If $\left| {\,a\,{{\sin }^2}\theta + b\sin \theta \cos \theta + c\,{{\cos }^2}\theta - \frac{1}{2}(a + c)\,} \right|\, \le \frac{1}{2}k,$ then ${k^2}$ is equal to
Find the value of the trigonometric function $\cot \left(-\frac{15 \pi}{4}\right)$
Find the value of $\sin \frac{31 \pi}{3}$.
The value of $\cos A - \sin A$ when $A = \frac{{5\pi }}{4},$ is