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Question: Answered & Verified by Expert
$\int \frac{d x}{1-\sin x}=$
MathematicsIndefinite IntegrationJEE Main
Options:
  • A $x+\cos x+c$
  • B $1+\sin x+c$
  • C $\sec x-\tan x+c$
  • D $\sec x+\tan x+c$
Solution:
2309 Upvotes Verified Answer
The correct answer is: $\sec x+\tan x+c$
$\begin{aligned} & \int \frac{d x}{1-\sin x}=\int \frac{(1+\sin x)}{1-\sin ^2 x} d x \\ & =\int \sec ^2 x d x+\int \tan x \cdot \sec x d x=\tan x+\sec x+c .\end{aligned}$

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