Answer to Question #86503 in Physics for Joshua

Question

6.____ is the component contributions of the basis to the unit vector
a.Direction sines
b.Direction Cosines
c.Direction tangents
d.All the options

7.Find l,m,n of the vector r=2i+4jâˆ′3k
a.2√29,4√29,−4√29
b.−2√29,4√29,−4√29
c.2√29,4√29,3√29
d.2√29,4√29,−3√29

8.___ in analytic geometry of vector are the cosines of angles between the vector and the three coordinate axes
a.Direction sines
b.Direction Cosines
c.Direction tangents
d.All the options

9.if a=a1i+a2j+a3k and b=b1i+b2j+b3k
find a.b
a.a1b1−a2b2−a3b3
b.a1b1+a2b2−a3b3
c.a1b1−a2b2+a3b3
d.a1b1+a2b2+a3b3

Answer 1

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