If Ā =2î + 4ĵ - 5k̂ the direction of cosines of the vector Ā are - VgyanHub

Question:

5. If Ā =2î + 4ĵ – 5k̂ the direction of cosines of the vector Ā are

Options :

a) 2/√45, 4/√45 and (-5)/√45
b) 1/√45, 2/√45 and 3/√45
c) 4/√45, 0 and 4/√45
d) 3/√45, 2/√45 and 5/√45

Answer :

a) 2/√45, 4/√45 and (-5)/√45

Answer Steps :

Solution :-

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