Question

Prove that.
If tanA=n tanB and sin A =m sin B, prove that n2 - 1.​

Answer 1

Step-by-step explanation:

We have to find cos2 A in terms of m and n. This means that the angle B is to be eliminated from the given relations. Read more on Sarthaks.com - https://www.sarthaks.com/31307/if-tana-n-tanb-and-sina-m-sinb-prove-that-cos-2a-m-2-1-n-2-1