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Question Number 43889 by SNILL JAMES last updated on 17/Sep/18
iftanA+tanB=90findtaAtanB
Answered by tanmay.chaudhury50@gmail.com last updated on 17/Sep/18
tan(A+B)=tanA+tanB1−tanAtanB1−tanAtanB=90tan(A+B)tanAtanB=1−90tan(A+B)
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