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8. In right triangle PQR, PQ = 12 and QR = 5 cm. What is cos R? a. 12/13 b. 5/13 c. 5/12 d. 12/5

8. In right triangle PQR, PQ = 12 and QR = 5 cm. What is cos R? a. 12/13 b. 5/13 c. 5/12 d. 12/5

Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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8. In right triangle PQR, PQ = 12 and QR = 5 cm. What is cos R? a. 12/13 b. 5/13 c. 5/12 d. 12/5 9. A kite held by 125 m of string makes an angle of elevation with the ground of 45°. About how high is the kite above the ground? a. 62.8 m b. 75.1 m c. 88.4 m d. 113.6 m 10. In the DEF, determine the measure of <D, to the nearest degree. a. 22° c. 20° b. 21° d. 19° D 8 E 11. From the top of a barn 7.62 m high, you see a cat on the ground. The angle of depression of the cat is 40°. How many meters must the catwalk reach the barn? a. 9.08 m c. 9.81 m b. 9.80 m d. 9.18 m 12. Given the figure on the right, which refers to the angle of depression? a. <MKN C. <LKN b. <MKL d. none of these 13. The expression 2(sin 30°) tan 45º is equal to eye K a. 0 c. 2 d. -1 b.. 1 A 14. Determine the correct formula for the tan ratio of < B. a. ten 8 = c. tan 8 = length of side adjacent to B length of the hyeatenuse length of side opposite to < B length of side adjacent to B length of side hypotenuse length of side opposite < B length of side opposite to < B length of the hypotenuse b. tan 8 = d. tan B = 15. From a point in the ground 7.62 m from the foot of the tree, the angle of elevation from the top of the tree is 32°. Determine the height of the tree to the nearest hundredths. a. 3.81 b. 6.46 c. 4.76 d. 12.19 16. Which statement is incorrect? a. The hypotenuse is the longest side in the right triangle. b. The hypotenuse is always the opposite side of the 90° in a right triangle. c. The Pythagorean theorem applies to all right triangles. d. You can solve for the unknown side in any triangle, if you know the lengths of the other two sides, by using the Pythagorean theorem. L object object .
Transcribed Image Text:8. In right triangle PQR, PQ = 12 and QR = 5 cm. What is cos R? a. 12/13 b. 5/13 c. 5/12 d. 12/5 9. A kite held by 125 m of string makes an angle of elevation with the ground of 45°. About how high is the kite above the ground? a. 62.8 m b. 75.1 m c. 88.4 m d. 113.6 m 10. In the DEF, determine the measure of <D, to the nearest degree. a. 22° c. 20° b. 21° d. 19° D 8 E 11. From the top of a barn 7.62 m high, you see a cat on the ground. The angle of depression of the cat is 40°. How many meters must the catwalk reach the barn? a. 9.08 m c. 9.81 m b. 9.80 m d. 9.18 m 12. Given the figure on the right, which refers to the angle of depression? a. <MKN C. <LKN b. <MKL d. none of these 13. The expression 2(sin 30°) tan 45º is equal to eye K a. 0 c. 2 d. -1 b.. 1 A 14. Determine the correct formula for the tan ratio of < B. a. ten 8 = c. tan 8 = length of side adjacent to B length of the hyeatenuse length of side opposite to < B length of side adjacent to B length of side hypotenuse length of side opposite < B length of side opposite to < B length of the hypotenuse b. tan 8 = d. tan B = 15. From a point in the ground 7.62 m from the foot of the tree, the angle of elevation from the top of the tree is 32°. Determine the height of the tree to the nearest hundredths. a. 3.81 b. 6.46 c. 4.76 d. 12.19 16. Which statement is incorrect? a. The hypotenuse is the longest side in the right triangle. b. The hypotenuse is always the opposite side of the 90° in a right triangle. c. The Pythagorean theorem applies to all right triangles. d. You can solve for the unknown side in any triangle, if you know the lengths of the other two sides, by using the Pythagorean theorem. L object object .
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