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If a VECTOR is parallel to +ve X axis its DRs will be 1,0,0 However If a VECTOR is parallel to -ve X Axis will its DRs be -1,0,0???

Is this because Vectors in 3D have a direction while a line doesnt have a direction???

Thats why a vector parallel to another but in opposite direction will have -ve DRs of that vector???

Dear Student,

yes, you are correct.Lines do not have any direction while a vector has. Vector by definition an entity with a magnitude as well as direction. A vector antiparallel (parallel but opposite in direction) is obtained by multiplying the direction ratios of the original vector with -1.

Hope this information will clear your doubts about topic.

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RegardsIf you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

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