If \[z=1+i\tan \alpha \,\left( -\pi

1.	If \[z=1+i\tan \alpha \,\left( -\pi
A.	\[\frac{1}{\cos \alpha }(\cos \alpha +i\sin \alpha )\]
B.	\[\frac{1}{-\cos \alpha }[\cos \,(\pi +\alpha )+i\sin (\pi +\alpha )\]
C.	\[\frac{1}{\cos \alpha }[\cos \,(2\pi +\alpha )+i\sin (2\pi +\alpha )]\]
D.	None of these
Answer» C. \[\frac{1}{\cos \alpha }[\cos \,(2\pi +\alpha )+i\sin (2\pi +\alpha )]\]

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If \[z=1+i\tan \alpha \,\left( -\pi

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