two force of 20N and 34N act on a body in such a way that they make an angle of 35 with each other. find the resultant of the two force

Answer 1

Using the law of cosines, and the fact that adjacent angles of a parallelogram are supplementary,

r^2 = 20^2 + 34^2 + 2*20*34 cos35°
r^2 = 2670

Answer 2

1200N