In Exercises 1–2,
find a. v. u,| v|,|u|
b. the cosine of the angle between v and u
c. the scalar component of u in the direction of v
d. the vector proj vu.
1. v = 2i - 4j + 25k, u =-2i + 4j - 25k
2. v = (3/5)i + (4/5)k, u = 5i+12j
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