Q. 43.7( 3 Votes )
If tan(A + B) = x
Formula: - (i)
let take 2A = (A + B) + (A – B)
tan2A = tan( (A + B) + (A – B) )
again taking 2B = (A + B) – (A – B)
tan(2B) = tan( (A + B) – (A – B) )
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