For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (9 sin t)i - (6 cos 5t)j +e-9tk ; to = 0
A. x = 9, y = -6t, z = -9 + t
B. x = 9t, y = -6, z = 1 - 9t
C. x = 9t, y = -6, z = 1 - t
D. x = 9t, y = 6, z = 1 + t
Answer: B
Mathematics
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