State the domain in interval notation. Unit test. a)ˇ b) 2ˇc) ˇd)e)In the gure to Free Response. Assessments. Review. Mastered. Click here for this and more tips for your test! Then cos2x+cosx = 2cos2 x+cosx−1 == 2y2 +y −1 =y = −b± √ b2 −4ac 2a = −1± 1+= −1±= 2 Practice Test. Powered by GitBook. Last updatedmonths ago. Attempted. For the following exercises, determine whether each of the following relations is a function Want to review or study some of these Precalculus and Calculus concepts ri