" 3.If vector "(hat a+2hat b)" is perpendicular to vector "(5hat a-4hat b)," then find the angle between "hat a" and "hat b" ."

If hat a and hat b are unit vectors such that [ hata hatb hatatimeshatb ]= (1)/(4) ,then the angle between hat a and hat b ,is equal to

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

Let hat a , hat b , hatc be unit vectors such that hat a * hatb =hat a *hatc =0 and the angle between hat b and hat c be (pi)/(6) prove that hat a =+- 2 (hatb xx hat c )

If hat(a) and hat(b) are unit vectors such that (hat(a) + hat(b)) is a unit vector, what is the angle between hat(a) and hat(b) ?

If hat(a) and hat(b) are unit vectors such that (hat(a) + hat(b)) is a unit vector, what is the angle between hat(a) and hat(b) ?

Let hat(a) , hat(b) " and " hat( c) be three unit vectors such that hat(a) xx (hat(b) xx hat( c)) = (sqrt(3))/(2)( hat(b) +hat(c )). If hat(b) is not parallel to hat( c) then the angle between hat(a) " and " hat(b) is

Let hat(a) , hat(b) " and " hat( c) be three unit vectors such that hat(a) xx (hat(b) xx hat( c)) = (sqrt(3))/(2)( hat(b) +hat(c )). If hat(b) is not parallel to hat( c) then the angle between hat(a) " and " hat(b) is