Question

If a ,b and c are interior angles of a triangle abc, then tan(a+b/2) is equal to

Answer 1

Answer:

cot c/2

Step-by-step explanation:

a+b+c=180(interior angles)

a+b=180-c

a+b/2=90-c/2

tan(a+b/2)=tan(90-c/2)

tan(a+b/2)=cot c/2