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April 1, 2015

April 1, 2015

Posted by **Joe** on Sunday, July 24, 2011 at 7:45pm.

- Vectors -
**Reiny**, Sunday, July 24, 2011 at 8:49pmmake a sketch by completing the usual parallelogram , if U+V = R

R^2 = 11^2 + 9^2 - 2(9)(11)cos 137°

= 346.808

R = 18.62

now use the Sine Law to findØ, the angle between V and R.

sinØ/9 = sin137°/18.62

sinØ = .329595

Ø = 19.24° with vector V, then

23.76° with vector U

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