Which relation has a domain of {3, 5, 8} ? o {(3, 8), (5, 3), (3, 5)}
O {(3, 2), (5, 1), (8,3), (1, 4)}
{(5, 1), (3, 4), (8, 2), (3, 3)}
{(2, 8), (1, 3), (3,5)}

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.