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JEE Main 2007Medium

Q.The lines x=acos⁡θ+bsin⁡θx = a \cos \theta + b \sin \theta, y=asin⁡θ−bcos⁡θy = a \sin \theta - b \cos \theta are perpendicular if

a
a=ba = b
b
a2+b2=1a^2 + b^2 = 1
c
a2−b2=0a^2 - b^2 = 0
d
a=0a = 0

Correct Answer: Option A

The correct solution involves applying the fundamental concept to derive the final value step by step...

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