Let L 1 and L 2 be the lines whose parametric equations are L 1 : x = 4 t , y = 1 − 2 t , z = 2 + 2 t L 2 : x = 1 + t , y = 1 − t , z = − 1 + 4 t (a) Show that L 1 and L 2 intersect at the point (2,0, 3). (b) Find, to the nearest degree, the acute angle between L 1 and L 2 at their intersection. (c) Find parametric equations for the line that is perpendicular to L 1 and L 2 and passes through their point of intersection.
Let L 1 and L 2 be the lines whose parametric equations are L 1 : x = 4 t , y = 1 − 2 t , z = 2 + 2 t L 2 : x = 1 + t , y = 1 − t , z = − 1 + 4 t (a) Show that L 1 and L 2 intersect at the point (2,0, 3). (b) Find, to the nearest degree, the acute angle between L 1 and L 2 at their intersection. (c) Find parametric equations for the line that is perpendicular to L 1 and L 2 and passes through their point of intersection.
4. Use method of separation of variable to solve the following wave equation
მłu
J²u
subject to
u(0,t) =0, for t> 0,
u(л,t) = 0, for t> 0,
=
t> 0,
at²
ax²'
u(x, 0) = 0,
0.01 x,
ut(x, 0) =
Π
0.01 (π-x),
0
Solve the following heat equation by method of separation variables:
ди
=
at
subject to
u(0,t) =0, for
-16024
ძx2 •
t>0, 0 0,
ux (4,t) = 0, for
t> 0,
u(x, 0) =
(x-3,
\-1,
0 < x ≤2
2≤ x ≤ 4.
ex
5.
important aspects.
Graph f(x)=lnx. Be sure to make your graph big enough to easily read (use the space given.) Label all
6
33
Chapter 11 Solutions
Calculus Early Transcendentals, Binder Ready Version
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