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 _{v}u.

1. v = 2i - 4j + 25k, u =-2i + 4j - 25k

2. v = (3/5)i + (4/5)k, u = 5i+12j

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