For Exercises 77-78, determine whether the statement is true or false for two points P r 1 , θ 1 and Q r 2 , θ 2 represented in polar coordinates. If the statement is false, give a counterexample. If r 1 = r 2 then P and Q are the same distance from the pole.
For Exercises 77-78, determine whether the statement is true or false for two points P r 1 , θ 1 and Q r 2 , θ 2 represented in polar coordinates. If the statement is false, give a counterexample. If r 1 = r 2 then P and Q are the same distance from the pole.
Solution Summary: The author explains that P and Q are at the same distance from the pole. If left|r_1right|=
For Exercises 77-78, determine whether the statement is true or false for two points
P
r
1
,
θ
1
and
Q
r
2
,
θ
2
represented in polar coordinates. If the statement is false, give a counterexample.
If
r
1
=
r
2
then P and Q are the same distance from the pole.
(7) (12 points) Let F(x, y, z) = (y, x+z cos yz, y cos yz).
Ꮖ
(a) (4 points) Show that V x F = 0.
(b) (4 points) Find a potential f for the vector field F.
(c) (4 points) Let S be a surface in R3 for which the Stokes' Theorem is valid. Use
Stokes' Theorem to calculate the line integral
Jos
F.ds;
as denotes the boundary of S. Explain your answer.
(3) (16 points) Consider
z = uv,
u = x+y,
v=x-y.
(a) (4 points) Express z in the form z = fog where g: R² R² and f: R² →
R.
(b) (4 points) Use the chain rule to calculate Vz = (2, 2). Show all intermediate
steps otherwise no credit.
(c) (4 points) Let S be the surface parametrized by
T(x, y) = (x, y, ƒ (g(x, y))
(x, y) = R².
Give a parametric description of the tangent plane to S at the point p = T(x, y).
(d) (4 points) Calculate the second Taylor polynomial Q(x, y) (i.e. the quadratic
approximation) of F = (fog) at a point (a, b). Verify that
Q(x,y) F(a+x,b+y).
=
(6) (8 points) Change the order of integration and evaluate
(z +4ry)drdy .
So S√ ²
0
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Polar Coordinates Basic Introduction, Conversion to Rectangular, How to Plot Points, Negative R Valu; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=aSdaT62ndYE;License: Standard YouTube License, CC-BY