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tanA/2=underroot1-e/1+e * tanB/2,then cosB=?

tanA/2=underroot1-e/1+e * tanB/2,then cosB=?

Grade:11

1 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
8 years ago
Hello Student,
tanA/2=root(1-e/1+e) * tanB/2
Use this formulae
cos2A=(1-tan^2A)/(1+tan^2A)
you should be done after that easily.
Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty

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