A particular straight line passes through origin and a point whose abscissa is double of ordinate of the point. The equation of such straight line is :
$y=\frac{x}{2}$
$y=2 x$
$y=-4 x$
$y=-\frac{x}{4}$
If $F = \frac{2}{{\sin \,\theta + \sqrt 3 \,\cos \,\theta }}$, then minimum value of $F$ is
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