Find the angle between the vectors <2,-4> and <-6,-1>. Round to the nearest whole degree.

Do i use the dot product to fnd the angle? And my classmate got 107 degrees as an answer and I wanted to see if he was correct or not, thanks!

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- May 6th 2013, 09:19 PMboltage619Find the angle between the vectors
Find the angle between the vectors <2,-4> and <-6,-1>. Round to the nearest whole degree.

Do i use the dot product to fnd the angle? And my classmate got 107 degrees as an answer and I wanted to see if he was correct or not, thanks! - May 6th 2013, 09:25 PMMarkFLRe: Find the angle between the vectors
Yes, you should have a component form and a trigonometric form for the dot product which will allow you to solve for the angle. To the nearest degree, your classmate is correct.

- May 6th 2013, 09:27 PMboltage619Re: Find the angle between the vectors
Thanks! Im using the formula right now, cos theta = a*b/|a|*|b|