For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (2t sin t + 2 cos t)i + (2t cos t - 2 sin t)j + 7k; normal plane at t = 1.5?.
A. y = -2
B. x - y + z = -2
C. x + y + z = -2
D. y = 2
Answer: A
Mathematics
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