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Ex 10.2
Ex 10.2, 2
Ex 10.2, 3 Important You are here
Ex 10.2, 4
Ex 10.2, 5 Important
Ex 10.2, 6
Ex 10.2, 7 Important
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Ex 10.2, 10 Important
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Ex 10.2, 12
Ex 10.2, 13 Important
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Ex 10.2, 15 Important
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Ex 10.2, 17 Important
Ex 10.2, 18 (MCQ) Important
Ex 10.2, 19 (MCQ) Important
Last updated at Aug. 23, 2021 by Teachoo
Ex 10.2, 3 Write two different vectors having same direction.Two vectors have the same directions if their direction cosines are same Let π β = 1π Μ + 1π Μ + 1π Μ and π β = 2π Μ + 2π Μ + 2π Μ Magnitude of π β = β(12+12+12) |π β | = β(1+1+1) = β3 Direction cosines of π β are (1/β3,1/β3,1/β3) Magnitude of π β = β(22+22+22) |π β | = β(4+4+4) = 2β(3 ) Directions cosines of π β are (2/(2β3),2/(2β3),2/(2β3)) = (1/β3,1/β3,1/β3) As Direction cosines of π β and π β are same, they have the same direction.