MathematicsEasy45×since 2004Q5673If tan15∘+1tan75∘+1tan105∘+tan195∘=2a\tan 15^\circ + {1 \over {\tan 75^\circ }} + {1 \over {\tan 105^\circ }} + \tan 195^\circ = 2atan15∘+tan75∘1+tan105∘1+tan195∘=2a, then the value of (a+1a)\left( {a + {1 \over a}} \right)(a+a1) is :A5−3235 - {3 \over 2}\sqrt 35−233B4−234 - 2\sqrt 34−23C2D4Check answerSkip