Trogonometry.

Asked by khushal305 | 27th Sep, 2009, 12:05: PM

Expert Answer:

LHS

=tanA+tanB/[(1/tanA)+(1/tanB)]

=tanA+tanB/[(tanA+tanB)/tanB.tanA]

=tanA.tanB

=RHS

Answered by  | 27th Sep, 2009, 02:20: PM

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