Mr. O'Brien's 2009-10 White Pre-AP Calculus: Miles Last Scribe Post, May 11

Tuesday, May 11, 2010

Miles Last Scribe Post, May 11

We began class with the quiz. It focused mostly on the law of cosines and vectors. We then checked the O'Brien answers to the quiz. We were reminded that the unit test will take place next tuesday the 18^th. We then went into vector projection. Tricky stuff to be sure. There were properties and such. A good derivation for Dot Products can be found at:

http://www.math.oregonstate.edu/home/programs/undergrad/CalculusQuestStudyGuides/vcalc/dotprod/dotprod.html

He fired up his trusty TI-84 Plus Silver Edition. With a flurry of button pushing, he proved beyond a shadow a doubt that theta does, in fact, equal 75 degrees. He then noted that cleverness was a key prerequisite to succes on the unit test. Bad news for Tyler.

Did you ever want to find the projection of vector u onto vector v? Well wait no longer True Believer, the magic formula, for the vector projection of vector u on vector v is:
$LaTeX Code: \\frac{\\vec{u}\\cdot\\vec{v}}{|\\vec{v}|^2}\\vec{v}$ Ta-Da!