.. and two units are vector. If vector 6 = a + 2b and d = 5a - 4b perpendicularly If they are, find the angle between them and 6.

Let a and b be two unit vectors. If the vectors c = a + 2b and d = 5a - 4b are perpendicular to each other, then the angle between a and b is

If a and b are two unit vectors such that a+2b and 5a−4b are perpendicular to each other, then the angle between a and b is

If a,b are unit vectors such that the vector a + 3b is perpendicular to 7a - 5b then the angle between a and b is

Let bar(a) and bar(b) be unit vector.If the vectors bar(c)=bar(a)+2bar(b) and bar(d)=5bar(a)-4bar(b) are perpendicular to the each other then angle between bar(a) and bar(b) is

If vec a and vec b are two unit vectors such that vec a+vec b is also a unit vector then find the angle between vec a and vec b

If vec a and vec b be two unit vectors such that vec a+ vec b is also a unit vector, then find the angle between vec a and vec b

If vec a and vec b are two unit vectors such that vec a+vec b is also a unit vector,then find the angle between vec a and vec b.