Question

find the values of x for which the equation cos x=-1 is true. let k represent the integer

Answer 1

cos x=-1
x = cos^-1 (-1) = 180* for [0,360] cycle
x = 180* + 360k where k represents an integer.

Answer 2

the only options they give me are
a.) 2pi(k)
b.)pi/2+2pi(k)
c.)pi+2pi(k)
d.) 3pi/2+2pi(k)

Answer 3

cosine is -1 at \(\pi,3\pi,5\pi,...\)

Answer 4

odd numbers in other words, times \(\pi\)

Answer 5

go with choice C
(it is always C)

Answer 6

thanks!

Answer 7

each roller under a conveyor belt has a radius of 0.5 meters. the rollers turn at a rate of 30 revolutions per minute. what is the linear velocity of the conveyor belt