JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

1 Easy

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Application +4 | -1

The angle between the pair of straight lines formed by joining the points of intersection of

{x^2} + {y^2} = 4

and

y = 3x + c

to the origin is a right angle. Then,

{c^2}

is equal to

View answer and explanation

Correct option: A

Option A (20) is correct because homogenizing the equation and applying the condition for perpendicular lines leads to

{c^2} = 20

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