CBSE Class 12 Mathematics 2026 Main Paper 65/2/3 · Q121 Markstrigonometric_integrals
CBSE Class 12 Mathematics 2026 Main Paper 65/2/3 · Question 12 (Integrals)
Evaluate \(\int\frac{dx}{\sec x+\tan x}\).
✅ Step-by-Step Solution
Final Answer: ln |1+sin x|+C
- On intervals where the integrand is defined, write 1/(sec x+tan x)=cos x/(1+sin x). Substitute u=1+sin x to get ln |1+sin x|+C.
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