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and are three vectors in different planes. Their resultant
(a)is zero
(b)can never be zero
(c)lies in plane containing
(d)lies in plane containing

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Important Questions on Vector Algebra
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Given: is the angle between and . Then is equal to

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A vector is along with the positive -axis and its vector product with another vector is zero vector, then could be

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If , then the angle between and is

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If and denote the sides of a parallelogram and its area is , then the angle between and is

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In the case of three vector quantities of the same type, where the resultant cannot be zero.

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The projection of the vector on the vector is

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If , then angle between the vectors and is
