The polar equation $\cos \theta+7 \sin \theta=\frac{1}{r}$ represents a
The polar equation $\cos \theta+7 \sin \theta=\frac{1}{r}$ represents a
circle
parabola
straight line
hyperbola
Solution
Polar equation is
$
\begin{aligned}
& \quad \cos \theta+7 \sin \theta=\frac{1}{r} \\
& \Rightarrow r \cos \theta+7 r \sin \theta=1 \\
& \text { Put } \quad x=r \cos \theta, y=r \sin \theta \text {, we get } \\
& \Rightarrow \quad x+7 y=1
\end{aligned}
$
This is the equation of straight line