Question

plz help me!!!!!

Answer 1

Given that vector sum A+B+C=0, out of three vectors two are equal in magnitude and the magnitude of third vector is \[\sqrt{2}\] times that of two having equal magnitude. then angle between vectors are given by
(i) 30,60,90
(ii)45,135,150
(iii)90,135,150
(iv)90,135,150

Answer 2

Hints:
-Vector sum A+B+C = 0 basically tells you that the vectors form a triangle.
-Two vectors are equal in magnitude, means two sides of the triangle are equal in length (An isosceles triangle) .
-Magnitude of third vector is sqrt(2) times the length of the other two. This makes it an isosceles right triangle. (What is special about the angles in a isosceles right triangle?)