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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
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