The value of \[\tan 4{}^\circ .\tan 43{}^\circ .\tan 47{}^\circ .\tan 86{}^\circ \]is

The value of \[\tan 4{}^\circ .\tan 43{}^\circ .\tan 47{}^\circ .\tan

1.	The value of \[\tan 4{}^\circ .\tan 43{}^\circ .\tan 47{}^\circ .\tan 86{}^\circ \]is
A.	2
B.	3
C.	1
D.	4
Answer» D. 4

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The value of \[\tan 4{}^\circ .\tan 43{}^\circ .\tan 47{}^\circ .\tan 86{}^\circ \]is

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