If A+B+C = 180 degree then prove that sin 2A + sin 2B + sin 2C = 4 sinA sinB sinC .

If A+B+C = 180 degree then prove that $s i n 2 A + s i n 2 B + \sin 2 C = 4 \sin A \sin B \sin C$ .

Matching exercise

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

STEP 1

STEP 2

STEP 3

STEP 4

STEP 5