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Angle between the planesa 1 x + b 1 y + c 1 z = d 1 and a 2 x + b 2 y + c 2 z = d 2 is θ and cosθ =
y 2 = 4ax & x 2 = 4ay represents standard forms of parabola.
( x − h ) 2 + ( y − k ) 2 = r 2 represents standard form of circle.
Passage-I
Angle between the planes
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