Find the exact value of cos a, given that sin a= 8/11 and
a is in quadrant i.
cos a= ?
(simplify your answer. type an exact answer, using radicals as needed.)

With this one. will mark brainliest

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as