Question

Tangents are drawn from the origin to the curve y=cos x. Their points of contact lie on

• A. \(x^2y^2=y^2-x^2\)
• B. \(x^2y^2=x^2+y^2\)
• C. \(x^2y^2=x^2-y^2\)
• D. None of these

Hint:

For tangent-from-origin problems, use parametric form and eliminate the parameter.

Answer 1

The Correct Option is D

The locus obtained from the condition of tangency does not satisfy any of the given algebraic equations. Hence, the correct answer is None of these.