Simplified form of \[\tan \left( \frac{\pi }{4}+\frac{1}{2}{{\cos }^{-1}}\frac{a}{b} \right)+\tan \left( \frac{\pi }{4}-\frac{1}{2}{{\cos }^{-1}}\frac{a}{b} \right)\] is

Simplified form of \[\tan \left( \frac{\pi }{4}+\frac{1}{2}{{\cos }^{-

1.	Simplified form of \[\tan \left( \frac{\pi }{4}+\frac{1}{2}{{\cos }^{-1}}\frac{a}{b} \right)+\tan \left( \frac{\pi }{4}-\frac{1}{2}{{\cos }^{-1}}\frac{a}{b} \right)\] is
A.	0
B.	\[\frac{2a}{b}\]
C.	\[\frac{2b}{a}\]
D.	\[\frac{\pi }{2}\]
Answer» D. \[\frac{\pi }{2}\]

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Simplified form of \[\tan \left( \frac{\pi }{4}+\frac{1}{2}{{\cos }^{-1}}\frac{a}{b} \right)+\tan \left( \frac{\pi }{4}-\frac{1}{2}{{\cos }^{-1}}\frac{a}{b} \right)\] is

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