A) \[-\,\,1\]
B) 1
C) 0
D) 2
Correct Answer: B
Solution :
\[\tan 75{}^\circ =\tan \,\,(45{}^\circ +30{}^\circ )\]as above \[\tan 75{}^\circ -\tan 45{}^\circ -\tan 30{}^\circ =\tan 75{}^\circ \tan 45{}^\circ \tan 30{}^\circ \]\[\tan 75{}^\circ -\tan 30{}^\circ -\tan 75{}^\circ \tan 30{}^\circ =\tan 45{}^\circ =1\]You need to login to perform this action.
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