If A+B+C = 180 degree then prove that sinA + sin B +sin C = 4 cosA/2 cosB/2 cosC/2

If A+B+C = 180 degree then prove that sinA + sin B +sin C = 4 cosA/2 cosB/2 cosC/2

Matching exercise

Match the items on the right to the items on the left.

STEP 1

STEP 2

STEP 3

STEP 4

STEP 5