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{\bf Math 225 : Quiz 1\hfill Sept. 2, 1991}

Show your work on a blank sheet of paper with your name and date at the top
(no torn edges).  Circle your final answer. You may use a calculator.

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1. Find a unit vector in the direction of $$\a = -2\i + \j + 2\k$$

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2. Find the angle between the vectors
$$\a =  -4\i - 3\k     \quad{\rm\ and}\quad \b = 4\i - 4\j -2 \k$$

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