MAT 156 B01 SUMMER 2018 TRIGONOMETRY Quiz: Allen Quiz 1 Chapter 1(Sectic This Question: 1 pt 3 of 30 (2 co Find a cofunction with the same value as the given expression. sin 9° Seiect tne correct cnoice Delow ana ? in tne answer oox to compiere your cnoice. (Simplify your answer. Type any angle measures in degrees. Do not include the degree s age OB, sin 90-cot O C. sin 9°-tan D. sin 90 # csc E. sin 90 #cos Click to select and enter your answerts) Course Tools Sample Tests and Quizzes 26 Solution For a right angled triangle, sine of an acute angle is equal to cos of its complimentary angle. Therefore, sin 9 o = cos(90-9) o = cos 81 o . .