A unit radial vector `hatr` makes angles of `alpha = 30^(@)` relative to the x-axis, `beta = 60^(@)` relative to the y-axis, and

A unit radial vector `hatr` makes angles of `alpha = 30^(@)` relative to the x-axis, `beta = 60^(@)` relative to the y-axis, and `gamma = 90^(@)` relative to the z-axis. The vector `hatr` can be written as :
A. `(1)/(2)hati+ (sqrt3)/(2)hatj`
B. `(sqrt3)/(2) hati+ (1)/(2) hatj`
C. `(sqrt2)/(3)hati+ (1)/(sqrt3) hatj`
D. None of these

A unit radial vector `hatr` makes angles of `alpha = 30^(@)` relative to the x-axis, `beta = 60^(@)` relative to the y-axis, and `gamma = 90^(@)` rela

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