Two forces of 2 and 3n respectively make an angle of 50, Physics

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Two forces of 2 and 3n respectively make an angle of 50

1) Two forces of 2 and 3N, respectively, make an angle of 50 degrees with each other. Determine the resultant analytically by applying the cosine law, namely, R^2= A^2 +2AB cos (theta) + B^2, where A and B are the two forces and R is the resultant?

2) If the two forces in the question 1 make an angle of 90 degrees with each other, discover the resultant. To what form does the cosine law reduce in this case?

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