Q1 of 73 Page 458

Write down a unit vector in XY-plane, making an angle of 30° with the positive direction of x-axis.

Given: A unit vector in XY- plane.


Let is a unit vector in the given XY- plane then the value of


Will be :


θ is the angle given, which is made by unit vector with positive direction of x-axis.


∴ for θ = 30°




Hence, the required unit vector is .


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