Multiple choice general knowledge math & puzzles

Derivative of tan x =

  1. sec2 x

  2. csc2 x

  3. -csc2 x

  4. -sec2 x
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The derivative of tan x is sec^2 x. This follows from writing tan x = sin x/cos x and applying the quotient rule. The notation 'sec2 x' in option A is meant to represent sec²(x). Options B and C use csc (cosecant), which is unrelated to tan derivatives. Option D has the wrong sign.

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