 Hi and welcome to the session. Let us ask the following question. The question says three forces acting on a particle are in equilibrium. If the angle between the first force and the second force be 120 degree and that between second force and the third force be 135 degree find the ratio of their magnitude. Let's now begin with the solution. Let P, Q, the three forces O, V and O, C. And the second force is 120 degree. That means this angle is of 120 degree. Angle between second force and third force is 5 degree, 25 degree. The ratio of the magnitude you'll see the sum of all the angles at O is equal to 360 degree and the three forces acting on a particle are in equilibrium acting on a particle. Each force is proportional to the other two. So, 5 degree, Q by sine 105. Now this implies sine 135 first, 1 by root 2. So we have P by 1 by root 2 equals to Q by... Now sine 105, this is equal to, equal to, is to root 6, is to root 6. So this completes the solution. Bye and take care.