Orthogonal unit vectors in ℝ 3 Consider the vectors I = 〈 1 / 2 , 1 / 2 , 1 / 2 〉 , J = 〈 − 1 / 2 , 1 / 2 , 0 〉 , and K = 〈 1 / 2 , 1 / 2 , − 1 / 2 〉 . a. Sketch I , J , and K and show that they are unit vectors. b. Show that I , J , and K are pairwise orthogonal. c. Express the vector 〈1, 0, 0〉 in terms of I , J , and K .
Orthogonal unit vectors in ℝ 3 Consider the vectors I = 〈 1 / 2 , 1 / 2 , 1 / 2 〉 , J = 〈 − 1 / 2 , 1 / 2 , 0 〉 , and K = 〈 1 / 2 , 1 / 2 , − 1 / 2 〉 . a. Sketch I , J , and K and show that they are unit vectors. b. Show that I , J , and K are pairwise orthogonal. c. Express the vector 〈1, 0, 0〉 in terms of I , J , and K .
Solution Summary: The author illustrates how to sketch the vectors I, J, and K using an online graphing calculator.
Orthogonal unit vectors in
ℝ
3
Consider the vectors
I
=
〈
1
/
2
,
1
/
2
,
1
/
2
〉
,
J
=
〈
−
1
/
2
,
1
/
2
,
0
〉
, and
K
=
〈
1
/
2
,
1
/
2
,
−
1
/
2
〉
.
a. Sketch I, J, and K and show that they are unit vectors.
b. Show that I, J, and K are pairwise orthogonal.
c. Express the vector 〈1, 0, 0〉 in terms of I, J, and K.
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
4
In the integral dxf1dy (7)², make the change of variables x = ½(r− s), y = ½(r + s), and
evaluate the integral. Hint: Find the limits on r and s by sketching the area of integration in the (x, y) plane along
with the r and s axes, and then show that the same area can be covered by s from 0 to r and r from 0 to 1.
7. What are all values of 0, for 0≤0<2л, where 2 sin² 0=-sin?
-
5π
6
π
(A) 0, л,
and
6
7π
(B) 0,л,
11π
, and
6
6
π 3π π
(C)
5π
2 2 3
, and
π 3π 2π
(D)
2' 2'3
, and
3
4元
3
1
די
}
I
-2m
3
1
-3
บ
1
#
1
I
3#
3m
8. The graph of g is shown above. Which of the following is an expression for g(x)?
(A) 1+ tan(x)
(B) 1-tan (x)
(C) 1-tan (2x)
(D) 1-tan
+
X
-
9. The function j is given by j(x)=2(sin x)(cos x)-cos x. Solve j(x) = 0 for values of x in the interval
Quiz A: Topic 3.10
Trigonometric Equations and Inequalities
Created by Bryan Passwater
can you solve this question using the right triangle method and explain the steps used along the way
Chapter 13 Solutions
Calculus: Early Transcendentals, Books a la Carte, and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition)
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