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JEE Previous Year Question

$The angle between the lines sin^{2} α \cdot y^{2} - 2 xy \cdot cos^{2} α + (cos^{2} α - 1) x^{2} = 0 is$

Topic: JEE PYQ

Answer: A. Full step-by-step solution below.

A $90^{\circ}$
B $α$
C $α /2$
D $2 α$

Correct answer: A

Solution

(a) : Clearly, a + b = sin^{2} α + (cos^{2} α - 1) = 0 \Rightarrow θ = 90^{\circ}

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