Find the family of vector fields in whose lines of force are straight lines.
The plane P
passes through the point
Find the [acute] angle q
(to the nearest 0.1°) between the line
and the plane
A temperature distribution for a region within 75 metres of the
origin is given by
Find the equations of the tangent plane and the normal line to the
sphere
x2 + y2 + z2
= 9
at the point (-2, 1, 2).
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