Sin(a + b) = sin a .cos b + cos a . sin b
what formula is applied, I mean what method
B the answer is B - hope this helps you out
Answer:
8.86
Step-by-step explanation:
Im guessing you want the rectangles area
Finding circle area do radius times radius times 3.14 so 1 x 1 = 1 x 3.14 = 3.14
Rectangle area is length times width so 3 x 4 = 12 - 3.14 = 8.86
