41. a unit vector â on the xy-plae is at an angle of 120 with respect of i. the angle between the vectors ü =aî+b and = = añ+bi will be 60 if a. b= v3al2 c. b=a

41. A unit vector â on the xy-plae is at an angle of 120 with respect of i. The angle between the vectors ü =aî+b and = = añ+bi will be 60 if A. b= V3al2 C. b=al/2 B. b 2al3 D. b=a