MCQ
$\int \frac{\sin x}{1+\sin x}$ dx = ______.
- Asec x - tan x - x + c
- Bsec x + tan x + x + c
- ✓sec x - tan x + x + c
- Dsec x + tan x - x + c
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$\ce{CH3 - CH2 - CH2 - OH ->[conc. H2SO4][\Delta]}$