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let vector a = i be a vector which makes an angle of 120 with a unit vector b. then the unit vector (a + b) is?? (Ans = 1/2i + 3/2j) Plz help me my answer is coming negative plz explain it with figure.

let vector a = i be a vector which makes an angle of 120 with a unit vector b. then the unit vector (a + b) is?? (Ans = 1/2i + 3/2j) Plz help me my answer is coming negative plz explain it with figure.

Grade:11

1 Answers

Saswat Pani
61 Points
4 years ago
A=i,As b is at angle 120 degree to a so B=icos120+jsin120 =icos(90+30)+jsin(90+30) =-isin30+jcos30 =-i/2+j√3/2A+B =i/2+j√3/2

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