Correct Answer: 7π Explanation: Formular for circumference is 2πr. Since the diameter of the circle is 7 inches and you need the radius, you have to divide the 7 by 2. Once you have the radius, plug it in to the formula.
We have the formula (sin x)^2 + (cos x)^2 = 1; Then, sin α = cos β = We apply the formula sin ( α + β ) = sin α x cos β + sin β x cos α = (3/5)x(4/5) + (4/5)x(3/5) = 12/25 + 12/25 = 24/25;
This is because to get to 14/15 you must divide by 6 but when getting to 42/45 you must divide 2. Therefore 14/15 is your answer because the problem went to the most reduced fraction.
