Originally Posted by
cottontails "Suppose a and b are vectors such that |a| = 3, b = 2 and the angle between a and b is (theta) = pi/3. Evaluate (a + b) . (a and b)." (Note: The '.' implying dot-product).
I am unsure with how to approach this question, considering there is also an angle involved. I am moreover unsure with how to evaluate the equation, since there are no numbers within it and it is with using the dot product. I did at first try expanding out the equation but then realised that was wrong. I really do not know what the angle implies in this question, either.