Question

The distance between the points (αcosθ, αsinθ ) and (-αcosθ, - αsinθ) is

Answer 1

Answer:

Answer is 2a

Step-by-step explanation:

To find distance between two points,

we use the distance formula..

D=√(x2-x1)²+(y2-y1)²

D=√(-αcosθ-αcosθ)²+(-asinθ-αsinθ)²

D=√(-2αcosθ)²+(-2asinθ)²

D=√4a²cos²θ+4a²sin²θ

D=2a√sin²θ+cos²θ

D=2a. { sin²θ+cos²θ=1}