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The direction cosines of the vector

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Reference no: EM131091600

1 If a is a non-zero vector of modulus a and m is a non-zero scalar, then ma is a unit vector if761_Untitled.png

2 For a non-zero vector a , the set of real numbers, satisfying l (5- x)a l<l 2al consists of all x such that

(a) 0<x<3  b) 3<x<7  c) -7<x<-3  d) -7<x<3

3. The direction cosines of the vector 3i-4j+5k are 

843_Untitled.png

Reference no: EM131091600

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