Hi, I have a Mechanics vector problem here split in two parts. First to solve the magnitude of the resultant vector and then to give the bearing at which it's acting at. Worked out most of it, but the last answer to the question isn't the same as mine. Kind of difficult to explain the question since I would need a diagram but hey, here it is: Question: A particle has velocity 4ms^-1 acting on it, in the east direction followed by a velocity of 5ms^1 acting at 30 degrees to the east direction. I found the resultant vector to be of magnitude 8.7 ms^-1, But a bearing of 73.3 degrees??? The magnitude part is right however, they give a bearing of 20.5 degrees rather than 73.3. For my bearing I done: 90 - tan^-1(5sin30/(4+5cos30)). Any help? Thanks.