Question 2 Consider the vectors a = 3i + 2j + 6k and b = -9i – 6j + 2k, where i, j, and k are mutually-perpendicular unit vectors forming a right-handed system. (a) Calculate (i) a + b. (ii) The magnitude lal of a. (iii) The unit vector b in the direction of b.

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Vectors In Two And Three Dimensions
Section9.CR: Chapter Review
Problem 6E
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Question 2
Consider the vectors a = 3i + 2j + 6k and b = -9i - 6j + 2k, where i, j, and k are
mutually-perpendicular unit vectors forming a right-handed system.
(a) Calculate
(i) a + b.
(ii) The magnitude la| of a.
(iii) The unit vector b in the direction of b.
(iv) The scalar product a · b.
(v) The vector product a x b.
(vi) The direction cosines of a.
(vii) The angle between a and b, expressed in degrees to two decimal places.
Transcribed Image Text:Question 2 Consider the vectors a = 3i + 2j + 6k and b = -9i - 6j + 2k, where i, j, and k are mutually-perpendicular unit vectors forming a right-handed system. (a) Calculate (i) a + b. (ii) The magnitude la| of a. (iii) The unit vector b in the direction of b. (iv) The scalar product a · b. (v) The vector product a x b. (vi) The direction cosines of a. (vii) The angle between a and b, expressed in degrees to two decimal places.
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