Question

if A,B,C Are the interiors angles of triangle A,B,C,find tan(B+C\2)

Answer 1

A+B+C=180then divide all this by 2
A/2+B/2++C/2=90
tan(a+b/2)=90-(a/2)
=cot(a/2)

Answer 2

Answer:

I hope it is helpful....................