1.25 & Orthogonal vectors: Insights via drawing. (Section 2.10) Consider three unit vectors â, b, and ĉ. Vector â is perpendicular to vector b. Vector b is perpendicular to vector ĉ. Vector a is not parallel to vector ĉ. In all cases, â is perpendicular to ĉ. True/False. Explain your answer by drawing â, b, ĉ and relevant angles.

Algebra and Trigonometry (6th Edition)
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Author:Robert F. Blitzer
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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1.25 insight via drawing and 1.26 please
(Section 2.9 and Hw 1.18)
be used to show that the magnitude of the vector ca, (e is a
number and a, is a unit vector) can be written solely in terms of e (without a.).
Result:
|câs =
1.20 † Magnitude of the vector v. Show work. (Section 2.9)
- abs(c)
Knowing the angle between a unit vector i and unit vector j is 110°,
calculate a numerical value for the magnitude of ý = 3i + 4J
Result:
v| = 4.098
1.21 Angle between vectors.
Note: The answer is not 5.
(Section 2.9)
Referring to the figure to the right, find the numerical value
for the angle between vector a and vector b.
2(ã, b) =
1.22 Visual estimation of vector dot/cross-products. Show work. (Sections 2.9 and 2.10)
Estimate (e.g., using your pinky) the magnitude of the vector p shown below.
Estimate the angle between p and ğ, p · ġ, and the magnitude of p x q.
Result: (Provide numerical results with 1 or more significant digits).
Note: 1 inch A 2.54 cm.
Show work.
2(p, á) =
cm
cm2
cm?
1.23 4 Form the unit vector û having the same direction as câx. (Section 2.4)
Result:
u =
ax
Note: âx is a unit vector and e is a on-zero real number, e.g., 3 or -3
1.24 4 Coefficient of û in cross products - definitions and trig functions. (Section 2.10)
The cross product of vectors a and b can be written in terms of a real scalar s as axb = sû
where û is a unit vector perpendicular to both a and b in a direction defined by the right-hand
rule. The coefficient s of the unit vector û is inherently non-negative. True/False.
1.25 & Orthogonal vectors: Insights via drawing. (Section 2.10)
Consider three unit vectors â, b, and ĉ.
Vector â is perpendicular to vector b.
Vector b is perpendicular to vector ĉ.
Vector a is not parallel to vector ĉ.
In all cases, â is perpendicular to ĉ. True/False.
Explain your answer by drawing â, b, ĉ and relevant angles.
1.26 Calculating distance between a point and a line via cross-products. (Section 2.10.2)
Draw a horizontally-right unit vector ây and vertically-upward unit vector ấy.
Draw a point Q whose position vector from a point P is ř/P = 5ây.
Draw a line L that passes through point P and is parallel to û =ây + ây.
Calculate the distance d between Q and L using both formulas in equation (2.9)
Result:
(2.9
(2.9)
Homework 1: Vectors - basis independent
60
Copyright © 1992-2017 Paul Mitiguy. All rights reserved.
Transcribed Image Text:(Section 2.9 and Hw 1.18) be used to show that the magnitude of the vector ca, (e is a number and a, is a unit vector) can be written solely in terms of e (without a.). Result: |câs = 1.20 † Magnitude of the vector v. Show work. (Section 2.9) - abs(c) Knowing the angle between a unit vector i and unit vector j is 110°, calculate a numerical value for the magnitude of ý = 3i + 4J Result: v| = 4.098 1.21 Angle between vectors. Note: The answer is not 5. (Section 2.9) Referring to the figure to the right, find the numerical value for the angle between vector a and vector b. 2(ã, b) = 1.22 Visual estimation of vector dot/cross-products. Show work. (Sections 2.9 and 2.10) Estimate (e.g., using your pinky) the magnitude of the vector p shown below. Estimate the angle between p and ğ, p · ġ, and the magnitude of p x q. Result: (Provide numerical results with 1 or more significant digits). Note: 1 inch A 2.54 cm. Show work. 2(p, á) = cm cm2 cm? 1.23 4 Form the unit vector û having the same direction as câx. (Section 2.4) Result: u = ax Note: âx is a unit vector and e is a on-zero real number, e.g., 3 or -3 1.24 4 Coefficient of û in cross products - definitions and trig functions. (Section 2.10) The cross product of vectors a and b can be written in terms of a real scalar s as axb = sû where û is a unit vector perpendicular to both a and b in a direction defined by the right-hand rule. The coefficient s of the unit vector û is inherently non-negative. True/False. 1.25 & Orthogonal vectors: Insights via drawing. (Section 2.10) Consider three unit vectors â, b, and ĉ. Vector â is perpendicular to vector b. Vector b is perpendicular to vector ĉ. Vector a is not parallel to vector ĉ. In all cases, â is perpendicular to ĉ. True/False. Explain your answer by drawing â, b, ĉ and relevant angles. 1.26 Calculating distance between a point and a line via cross-products. (Section 2.10.2) Draw a horizontally-right unit vector ây and vertically-upward unit vector ấy. Draw a point Q whose position vector from a point P is ř/P = 5ây. Draw a line L that passes through point P and is parallel to û =ây + ây. Calculate the distance d between Q and L using both formulas in equation (2.9) Result: (2.9 (2.9) Homework 1: Vectors - basis independent 60 Copyright © 1992-2017 Paul Mitiguy. All rights reserved.
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