# Posts by yanxin

Total # Posts: 1

**math**

The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s = 4 sin ¦Ðt + 3 cos ¦Ðt, where t is measured in seconds. (a)Find the average velocity during each time period. (i) [1, 2] (ii...

*September 3, 2011*

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**1**