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Exam2reviewAnswers - Math112 Exam 2 Review Answers Fall...

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Unformatted text preview: Math112 Exam 2 Review Answers Fall 2010 1. Sketch each angle in standard position: π/ 3, 3 π/ 4, 7 π/ 6,- π/ 4, 3 π 3 3 π 4 7 π 6- π 4 3 2. Find the coterminal angles in [0 , 2 π ), and determine the quadrants in which they lie:- 3 π/ 4, 17 π/ 6 11 π/ 3 Answers: 5 π/ 4 (III), 5 π/ 6 (II), 5 π/ 3 (IV) respectively 3. Find the coterminal angles in [0 , 360 ◦ ) and determine the quadrants in which they lie: 390 ◦ ,- 30 ◦ , 1050 ◦ Answers: 30 ◦ (I), 330 ◦ (IV), 330 ◦ (IV) respectively 4. Change degrees to radians: 240 ◦ , 150 ◦ Answers: 4 π/ 3 5 π/ 6 respectively 5. Change radians to degrees: 5 π/ 6, 7 π/ 4 Answers: 150 ◦ , 315 ◦ 6. Find the radian measure of the central angle of a circle of radius 7 inches subtended by an arc of length 14 inches. Answer: 2 radians 7. Find the length of the arc on a circle of radius 9 meters that subtends a central angle 60 ◦ . Answer: 3 π 8. Find the area of the circular sector with radius 6 inches, and angle 45 ◦ ....
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Exam2reviewAnswers - Math112 Exam 2 Review Answers Fall...

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