Find the reference angle 
.
?
?
A. 
?
B.
C.
D.
E.
Answer: C
Mathematics
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Parametrize the surface S.S is the portion of the sphere x2 + y2 + z2 = 36 between z = - 3
and z = 3
.
What will be an ideal response?
Mathematics
Find the unit tangent vector T and the principal unit normal vector N. r(t) = (ln(cos t) + 1)i + 3j + (7 + t )k, -?/2 < t < ?/2
A. T = (sin t)i + (cos t)k; N = (cos t)i - (sin t)k B. T = (-sin t)i + (cos t)k; N = (-cos t)i + (sin t)k C. T = (sin t)i - (cos t)k; N = (cos t)i - (sin t)k; D. T = (-sin t)i + (cos t)k; N = (-cos t)i - (sin t)k
Mathematics
Evaluate the expression.
2
A. 
B. 
C. 
D. 
Mathematics
State whether the vectors are parallel, orthogonal, or neither.v = 2i + j,
w = i - 2j
A. Parallel B. Orthogonal C. Neither
Mathematics