NCERT Class 12 · Ch 7 Exercise 7.2 · Q28
NCERT Class 12 Maths · Chapter 7 Integrals · Exercise 7.2 Question 28
Evaluate \(\int \frac{\cos{\left(x \right)}}{\sqrt{\sin{\left(x \right)} + 1}}\, dx\).
💡 Concept Hints
- Identify the domain and the inner and outer functions, or the relevant one-sided limits.
- Apply the appropriate differentiation or limit rule, keep all chain factors, and check exceptional points.
✅ Step-by-Step Solution
Final Answer: \(2 \sqrt{\sin{\left(x \right)} + 1}\) + C.
- Work on each open interval where the original integrand is real and defined.
- u=1+sin x, du=cos x dx.
- An antiderivative is F(x)=\(2 \sqrt{\sin{\left(x \right)} + 1}\).
- Differentiate this expression to check that F′(x)=\(\frac{\cos{\left(x \right)}}{\sqrt{\sin{\left(x \right)} + 1}}\). Add an arbitrary constant C on each domain component.
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