When the plane cuts the cone at its vertex with $\beta = \alpha$, the degenerate section is:
Aa point
Ba straight line
Ctwo intersecting lines
Da parabola
Answer & Solution
Correct answer: B. a straight line
$\beta = \alpha$ at vertex: plane contains a generator → **a straight line** (degenerate parabola).
Related questions
Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE For [[1,2],[2,4]], the determinant equals:If A is invertible, |A^{−1}| equals:For a 3 × 3 non-singular A with |A| = 5, the value of |adj A| is:For a non-singular square matrix A of order n, |adj A| equals:For non-singular A, B of the same order, (AB)^{−1} equals:For a non-singular A, (A^{−1})^{−1} equals: