Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.
cos
Х
O A. 3 + 2 cos 2x + cos 4x/
8
B. 3+4 cos 2x + cos 4x/
8
C. 2-4 cos 2x + cos 4x/
8
D.
3-4 cos 2x + cos 4x/
8

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.