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AP EAMCET202119 Aug 2021Evening ShiftMathematicsDifferentiationActual

d d x tan − 1 ⁡ cos ⁡ x 1 + sin ⁡ x =

Options

  1. A1 2
  2. B− 1 2
  3. C1
  4. D− 1

Correct answer

B. − 1 2

Step-by-step solution

d d x tan − 1 ⁡ cos ⁡ x 1 + sin ⁡ x = 1 1 + cos ⁡ x 1 + sin ⁡ x 2 × d d x cos ⁡ x 1 + sin ⁡ x = 1 1 + cos 2 x 1 + sin 2 x + 2 sin   x × 1 + sin   x · - sin x - cos x · cos   x 1 + sin   x 2 = 1 + sin   x 2 2 + 2 sin   x × - sin x - 1 1 + sin   x 2 = - 1 2

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