Three strings, attached to the sides of a rectangular frame, are tied together by a knot as shown in the figure. The magnitude of the tension in the string labeled C is 83.7 N. Calculate the magnitude of the tension in the string marked A.
T = Tension in A =Tension in B ( for equilibrium in the direction perpendicular to C)
Hence 2T cos 45= Tension in C= 83.7 (The angle between A and B is 90 degrees)
T= 59.18 N