Q. Which trigonometric ratio is undefined at 90°?

  • (A) Sin
  • (B) Cos
  • (C) Tan
  • (D) Cosec
✅ Correct Answer: (C) Tan
Explanation: tan 90° is undefined because cos 90° = 0.

Published by Roshan ⭐ 3.42K Points at 05-Jul-2026 12:26 pm in Math

Explanation by: Roshan
tan 90° is undefined because cos 90° = 0.

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