Given Info: 4 m/s [N30°E] and 5 m/s [S17°E]. FIND: The Resultant Vector And it's angle. So i'm having a big problem with figuring the angles between the two vectors... I feel like i'm doing it correctly, but at the same time i'm not sure... Here's my diagram. http://i47.tinypic.com/x38osl.jpg So the angle between them, from what i see, is 30 degrees + 17 degrees = 47 degrees.. The reason i'm not comfortable with this... is because when i place my drawing on the same coordinate system, I will have 60 degrees between the X axis and vector a, and 73 degrees between the X axis and vector b... Therefore the angle between them should be 133 degrees... So i'm not sure now which angle is correct.. this trigonometry method seems a lot tougher than the component method. .... But actually... I see something... 47 degrees is = 180 - 133 And the 133 degrees is when they are cnonected head to head.. and the 47 degrees is connected from head to tail.. So the angle should be 47 degrees bewteen them? is this right? and if so, does this mean the angle between two vectors is when they are connected head to head, or head to tail?