Q. The polar equation $\cos{\theta + 7\sin{\theta = \frac{1}{r}}}$ represents a
A) Circle
B) Parabola
C) Straight line
D) Hyperbola
Explanation
(c)
Given polar equation is
$r\cos\theta + 7r\sin\theta + 1$
Put $x = r\cos\theta,\ y = r\sin\theta,\$ we get
$\Rightarrow x + 7y = 1$
This is the equation of straight line.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.