Question 96Asked in BPSC TRE 3.0 (2024) Mathematics Class 11-12

The value of ∫√(1 + sin x) dx, isसमाकल ∫√(1 + sin x) dx का मान है

समाकल ∫√(1 + sin x) dx का मान है
  1. Asin(x/2) + cos(x/2)sin(x/2) + cos(x/2)
  2. B2(cos(x/2) − sin(x/2))2(cos(x/2) − sin(x/2))
  3. C2(sin(x/2) − cos(x/2))2(sin(x/2) − cos(x/2))
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (C) 2(sin(x/2) − cos(x/2))2(sin(x/2) − cos(x/2))

Explanation

1 + sin x = sin²(x/2) + cos²(x/2) + 2 sin(x/2)cos(x/2) = (sin(x/2) + cos(x/2))². So the integral is ∫(sin(x/2) + cos(x/2)) dx = −2cos(x/2) + 2sin(x/2) = 2(sin(x/2) − cos(x/2)) + C.1 + sin x = sin²(x/2) + cos²(x/2) + 2 sin(x/2)cos(x/2) = (sin(x/2) + cos(x/2))²। अतः समाकल ∫(sin(x/2) + cos(x/2)) dx = −2cos(x/2) + 2sin(x/2) = 2(sin(x/2) − cos(x/2)) + C।

From BPSC TRE 3.0 (2024) Mathematics Class 11-12 — Previous Year Paper

This is question 96 of BPSC TRE 3.0 (2024) Mathematics Class 11-12 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.