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Tan(a+b)=x &tan(a-b)=y find the values of tan2a &tan 2b?


Tan(a+b)=x &tan(a-b)=y find the values of tan2a &tan 2b?


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1 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Write,
tan 2a = tan [ (a+b) + (a-b)]
= [tan (a+b) + tan (a-b)]/ [1- tan(a+b).tan(a-b)]

now, put the reqd values and find tan 2a. Similarly, write, tan 2b = tan[ (a+b) - (a-b)] and apply d formula. Substitute and get d value.

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