\[\frac{1+\sin A-\cos A}{1+\sin A+\cos A}\]=

1.	\[\frac{1+\sin A-\cos A}{1+\sin A+\cos A}\]=
A.	\[\sin \frac{A}{2}\]
B.	\[\cos \frac{A}{2}\]
C.	\[\tan \frac{A}{2}\]
D.	\[\cot \frac{A}{2}\]
Answer» D. \[\cot \frac{A}{2}\]

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\[\frac{1+\sin A-\cos A}{1+\sin A+\cos A}\]=

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