Solve the problem.The following equations each describe the motion of a particle. For which path is the particle's speed constant?(1) r(t) = t6i + t4j(2) r(t) = cos (8t)i + sin (4t)j(3) r(t) = ti + tj(4) r(t) = cos (7t2)i + sin (7t2)j
A. Path (2) and Path (3)
B. Path (4) and Path (2)
C. Path (3)
D. Path (1)
Answer: C
Mathematics
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