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154E2-S2010 - MA 15400 Exam 2 Spring 2010 Covers all of...

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MA 15400 Exam 2 Spring 2010 Covers all of Section 6.7, 7.2, 7.3 and all of 7.4 1 1. Given , ABC which one the following statement is completely true. A. 3 3, 6 3 x y = = B. 6 3, 12 3 x y = = C. 9 2, 9 3 x y = = D. 3 2, 3 11 x y = = E. None of the above. 2. Given , ABC find the values of t and r approximated to the nearest tenth. 3. Which of the following is equivalent to cos 3 π θ + ? A B C 21 ° r t 15.6 A B C 60 ° x y 9
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MA 15400 Exam 2 Spring 2010 Covers all of Section 6.7, 7.2, 7.3 and all of 7.4 2 4. An airplane, flying at a speed of 345 miles per hour, flies from point A in the direction 131˚ for two hours and then flies in the direction 221˚ for one hour. What direction, to the nearest degree, does the plane need to fly to return to point A?
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