Find T, N, and B for the given space curve.r(t) = (1 + t)i + (8 + ln (sec t))j - 9k, -?/2 < t < ?/2
A. T = (cos t)i + (sin t)j; N = (- sin t)i + (cos t)j; B = k
B. T = (cos t)i - (sin t)j; N = (-sin t)i - (cos t)j; B = -k
C. T = (-cos t)i - (sin t)j; N = (sin t)i - (cos t)j; B = -k
D. T = (-cos t)i - (sin t)j; N = (-cos t)i + (sin t)j; B = k
Answer: A
Mathematics
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