Multiple choice general knowledge

Find the odd one out

  1. tan(90)

  2. cosec(0)

  3. sec(90)

  4. cot(90)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cot(90°) equals 0, which is a defined value. The other three trigonometric expressions are undefined because they involve division by zero: tan(90°) = sin(90°)/cos(90°) = 1/0, cosec(0°) = 1/sin(0°) = 1/0, and sec(90°) = 1/cos(90°) = 1/0.

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