This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: aljabr (faa335) Hw01 Ross (89251) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points The cartesian coordinates of a point in the xy plane are x = 7 . 24 m, y = 4 . 69 m. Find the distance, r , from the point to the origin. Correct answer: 8 . 62634 m. Explanation: To find the distance from the point to the origin, we use the formula r = radicalbig x 2 + y 2 , which gives us r = radicalBig ( 7 . 24 m ) 2 + ( 4 . 69 m ) 2 = 8 . 62634 m . 002 (part 2 of 2) 10.0 points Calculate the angle between the radius- vector of the point and the positive x axis (measured counterclockwise from the positive x axis, within the limits of 180 to +180 ). Correct answer: 147 . 065 . Explanation: The formula tan = y x and the fact that the point is in the third quadrant of the coordinate system (since the cartesian coordinates x and y of the point are negative), yield = arctan y x 180 = arctan ( 4 . 69 m ) ( 7 . 24 m ) 180 = 147 . 065 . That is, = 147 . 065 ....
View Full Document
- Spring '10