Solve, a.Determine the conic section of the polar equation displaystyle{r}=frac{8}{{{2}+{2} sin{theta}}} represents. b. Describe the location of a directrix from the focus located at the pole.

Caelan

Caelan

Answered question

2020-11-05

Solve, a.Determine the conic section of the polar equation r=82+2sinθ represents. b. Describe the location of a directrix from the focus located at the pole.

Answer & Explanation

Laaibah Pitt

Laaibah Pitt

Skilled2020-11-06Added 98 answers

a)
Given: r=82+2sinθ
On simplification, we get
r=82(1+sinθ)
r=41+sinθ
Now, comparing with r=ep1+esinθ, we get
e=1
ep=41×p=4p=4
Since e=1, therefore the given equation is a parabola.
Step 2
b)
Equation of directrix is,
y=p
y=4
Jeffrey Jordon

Jeffrey Jordon

Expert2021-10-26Added 2605 answers

Answer is given below (on video)

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