Question

two forces of magnitude 375 unit act 60° with each other what is the magnitude of the resultant ​

Answer 1

Simple parallelogram addition of vectors, uses cosine rule:

square of resultant force = 375^2 + 375^2 - 2 * 375 * 375 * cos 60 = 140625 + 140625 - (2 * 375* 375) /2 = 140625

resultant force = sqrt(140625) = 375