JEE Math Practice Question
If $$\tan 15^\circ + {1 \over {\tan 75^\circ }} + {1 \over {\tan 105^\circ }} + \tan 195^\circ = 2a$$, then the value of $$\left( {a + {1 \over a}} \right)$$ is :
- A.$$5 - {3 \over 2}\sqrt 3 $$
- B.$$4 - 2\sqrt 3 $$
- C.2
- D.4
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