(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

VectorsAandBhave equal magnitudes of 4.93. If the sum ofAandBis the vector 6.79j, determine the angle betweenAandB

2. Relevant equations

c^2 = a^2 + b^2 -2abcos(theta)

3. The attempt at a solution

I just rearranged the formula above so that I could solve for the angle. I keep getting the same answer (87.0 or 87.1 degrees) but its still wrong. Is it the fact that the sum is 6.79j with j meaning something? I know its a unit vector that indicates direction but I wasn't too sure. Please help!!

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# Homework Help: Finding Vector Angle using cosine law

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