Question

if a b and c are the interior angles of triangle ABC find tan of B + c by 2

Answer 1

MARK IT AS BRILLIAST

Answer 2

A+B+C=180

Div 2 on bs

A+B+C/2=90

B+C/2=90-A/2

Tan(B+C by 2)=Tan(90-A/2)

Tan (B+C/2)=cot(A/2)

Hope this helps uhh:)