indefinite-integration

Question: $\int_{{}}^{{}}{\frac{\cos x-\sin x}{1+\sin 2x}\ dx=}$

1) $-\frac{1}{\cos x+\sin x}+c$

2) $\frac{1}{\cos x+\sin x}+c$

3) $\frac{1}{\cos x-\sin x}+c$

4) None of these

Solution:

Explanation: No Explanation

Integration by substitution

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