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# Vectors in Trigonometry Practice Questions (page 2)

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 1 (13.36,68.71) 2 (18.47, –23.64) 3 (–66, –17.9) 4 (–9.85,1.74) 5 (–50.53, –131.63) 6 length 12.37 at 14° south of west or 194° 7 length 7.28 at 74° or 16° east of north 8 length 24.7 at 21.4° south of east or 338.6° 9 length 239.6 at 29.8° north of west or 150.2° 10 length 3.709 at 31.3° east of south or 301.3° 11 150 · cos(20°) ≈ 141 lbs. 12 80 · cos(5°) ≈ 79.7 Ibs. 13 200 · cos(60°) ≈ 100 lbs. 14 180 · cos(37°) ≈ 144 lbs. 15 130 · cos(8.6°) ≈ 128.5 lbs. 16 100 · cos(75°) ≈ 25.9 Ibs. 17 200 · cos(72°) ≈ 61.8 Ibs. 18 40 · cos(48°) ≈ 26.8 Ibs. 19 1,000 · cos(85°) ≈ 87 lbs. 20 100 · cos(3°) ≈ 99.9 lbs. 21 68.6 meters from the starting point, heading about 27° west of north 22 about 35.9 miles 23 She is about 10° south of west from where she started, so she should head 10° north of east to go back. 24 The car is about 40 miles from where it started, in the direction that is 8.5° north of east. 25 It is being pulled with about 293 pounds of force in a direction about 10° from the person pulling with 180 pounds of force.

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