In the following question, would the answer be 22.5 or -22.5?

http://imageshack.us/m/862/1426/vectors.png

The answer in the back of the book says 22.5 so I'm not sure if I'm missing something or if it's a typo.

Printable View

- May 22nd 2011, 10:38 AMIanCarneyVectors dot prodoct question/clarification
In the following question, would the answer be 22.5 or -22.5?

http://imageshack.us/m/862/1426/vectors.png

The answer in the back of the book says 22.5 so I'm not sure if I'm missing something or if it's a typo. - May 22nd 2011, 10:47 AMPlato
$\displaystyle \vec{a}\cdot\vec{b}=\|\vec{a}\|\|\vec{b}\|\cos(\al pha)$

- May 22nd 2011, 10:49 AMTheEmptySet
- May 22nd 2011, 11:05 AMIanCarney