यदि $\int \frac{dx}{1 + \sin x} = \tan \left( \frac{x}{2} + a \right) + b$ है,तो

  • A
    $a = \frac{\pi}{4}, b = 3$
  • B
    $a = -\frac{\pi}{4}, b = 3$
  • C
    $a = \frac{\pi}{4}, b = \text{स्वेच्छ अचर}$
  • D
    $a = -\frac{\pi}{4}, b = \text{स्वेच्छ अचर}$

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निम्नलिखित कथनों $(A)$ और $(B)$ पर विचार करें:
$(A) \int_a^b \frac{d}{d x}(f(x)) d x = \frac{d}{d x} \int_a^b f(x) d x$
$(B) \frac{d}{d x} \left( \int f(x) d x \right) = f(x) + C$
निम्नलिखित में से कौन सा सत्य है?

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