Pi = 3.141593
Radius = half diameter
Calculate Circumference = 2 pi r (2*pi*radius)
Calculate Time = Circumference / Speed
Answer:
Hello,
356
Step-by-step explanation:
Recall the identity,
(link to proof in the comments)
so that the required sum has a value of
Recall another identity,
which means
Then the sum's value reduces to 1/2.
Answer: C
Step-by-step explanation: