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Let 7 =< -3,1,6 > and 7 =< 7,0, 4 >. (a) Find 7. (b) Are 7 and orthogonal? Why or why not? (c) Find the cosine of the angle between 7 and . Give an exact answer (in fraction form), NOT a decimal approrimation.

Let 7 =< -3,1,6 > and 7 =< 7,0, 4 >. (a) Find 7. (b) Are 7 and orthogonal? Why or why not? (c) Find the cosine of the angle between 7 and . Give an exact answer (in fraction form), NOT a decimal approrimation.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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2. Let 7 =< -3, 1,6 > and =< 7,0,4 >. (a) Find -7. (b) Are 7 and T orthogonal? Why or why not? (c) Find the cosine of the angle between 7 and 7. Give an exact answer (in fraction form), NOT a decimal approrimation.
Transcribed Image Text:2. Let 7 =< -3, 1,6 > and =< 7,0,4 >. (a) Find -7. (b) Are 7 and T orthogonal? Why or why not? (c) Find the cosine of the angle between 7 and 7. Give an exact answer (in fraction form), NOT a decimal approrimation.
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