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## Homework Statement

Vector V_1 points along the z axis and has magnitude V_1 = 80. Vector V_2 lies in the xz plane, has magnitude V_2 = 51, and makes a -49

^{o}angle with the x axis (points below x axis)

## Homework Equations

A.B=ABCos(theta)=A

_{x}B

_{x}+A

_{y}B

_{y}+A

_{z}B

_{z}

Cos(theta)=(A

_{x}B

_{x}+A

_{y}B

_{y}+A

_{z}B

_{z})/AB

## The Attempt at a Solution

im not really sure where to go from here im not sure if those equations are useful