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DoctorMathU
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Homework Statement
Vectors A and B are in the xy plane and their scalar product is 20.0 units. If Amakes a 27.4° angle with the x-axis and has magnitude A=12.0 units and B has magnitude B= 24.0 units, what can you say about the direction of B?
Answer: 113.4° and 301.4°
The Attempt at a Solution
I am not really good at vectors, so i just did the basic stuff like, cos(x)= a⋅b/(||a||⋅||b||)
But it gives me 86°, that's not the solution...