Question

if b-a =mc, prove that :cot1/2(B-A)=1+mcosB/msinB

Answer 1

Step-by-step explanation:

We know,

tan(B−A2)=b−ab+a.cot(C2)

. Then

b−a=mc

(b+a).tan(B−A2).cot(C2)=mc