Question

if a b c are the interior angles of triangle ABC prove that

Answer 1

If A, B, C are the interior angles of triangle then A + B + C = 180

⇒ C + A = 180 - B

⇒ (C + A)/2 = 90 - B/2

applying Tan on both sides of the equation

⇒ Tan(C + A)/2 = Tan(90 - B/2)

⇒ Tan(C + A)/2 = Cot(B/2)

Answer 2

can take C+A instead of B+C

❇️hope this helps!!!❇️

#sumedhian ❤❤