The two vectors a and b have equal magnitudes of 13.0 m and their angles are θ1 = 30° and θ2 = 100°. Find the components of their vector sum, r. I know this is a very simple problem, but I can't get it! And it is frustrating me to no end. I know the y component of the sum is 16.3. (I don't remember how I got this, but it's right.) However, when I try to find the x components of each vector, I get 11.26 for a, and -2.26 for b. When these are added, you get 9.0. And the computer(our HW is graded online) is telling me that this is the wrong answer. What am I doing wrong?!