HW for Tuesday

Two vectors:

X = 4i - 5j + 9k
Y = 10i - 12j + 3k

Find:

X + Y
X - Y
X  (magnitude)
Y (magnitude)
dot product of X and Y
angle between X and Y

Read ahead in the student guide through cross products.  Note the differences between the cross product and dot product.

Also recall the dot products of:  i dot i, etc., and i dot j etc.  Note how they differ in the cross product.