" 1.What is the angle between "2a" and "4a" ? "

What is the angle between a and -(3)/(2) a .

What is the angle between a and -(3)/(2) a .

If hata.hatb=1/2 then what is the angle between hata and hatb ?

What is the angle between hour hand and minute hand at 2:25 pm?

What is the angle between the hands of the clock at 4.10 ?

What is the angle between the hands of the clock at 2.20 ?

What is the angle between two planes 2x-y+z=4 and x+y+2z=6 ?

What is the angle between the lines (x+2)/-4 = (y + 3)/5 = (z - 1)/3 and (1 - x)/-4 = (y - 1)/5 =(2 -z)/3 .