1. The problem statement, all variables and given/known data Given the magnitudes of vectors u and v and the angle θ between them, find sum of u + v. Give the magnitude to the nearest tenth when necessary and give the direction by specifying the angle that the resultant makes with u to the nearest degree. 2. Relevant equations |u| = 15, |v| = 15, θ = 116° 3. The attempt at a solution Knowing only the answer (15.9, 58°) and some trig ideas: I draw an angle of 116 degrees in the starting point of the trig plane. I drop a line from the angle end side, forming a triangle with a 64 degree angle in quadrant II. The other angles of the triangle are both 58 degrees (116 deg / 2). Both opposite (U) and adjacent (V) sides are 15. SAS - law of cosines c^2 = (15)^2 + (15)^2 - 2 (15)(15) cos (64 deg) c = 15.9 angle = 58 deg (15.9, 58 deg) What is the correct method?