The greatest value of the function $-5 \sin \theta+12 \cos \theta$ is
$12$
$13$
$7$
$17$
A particle moves along the straight line $y=3 x+5$. Which coordinate changes at a faster rate?
The sum of the series $1+\frac{1}{4}+\frac{1}{16}+\frac{1}{64}+\ldots \ldots . \infty$ is
The slope of the tangent to the curve $y = ln\, (cos\,x)$ a $x = \frac{3\pi}{4}$ is