Question

What is the sine value of 2 pi over 3?

Answer 1

the sin value is radical 3 over 2.

Answer 2

sin deals with the y value and 2π/3 is 120 degrees. at 120 degrees the coordinate is (-1/2, rad 3/2) so the y value is your sin value

Answer 3

The life expectancy of a typical lightbulb is normally distributed with a mean of 2,000 hours and a standard deviation of 27 hours. What is the probability that a lightbulb will last between 1,975 and 2,050 hours?

0.17619

0.32381

0.79165

0.96784