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December 20, 2014

December 20, 2014

Posted by **Minte** on Sunday, November 25, 2012 at 6:12pm.

- Physics -
**bobpursley**, Sunday, November 25, 2012 at 7:24pmSum A+B

difference=A-B

maginitude sum=ABcosTheta

magnitude difference=ABcos(PI-Theta)

setting them equal, then cosTheta=cos(PI-Theta)

costheta=sinThetasinPI-cosThetaCosPI

cosTheta=sinTheta+cosTheta

which makes sense only if theta is zero or PI. The vectors A,B are colinear

- PHYSICS -
**Anonymous**, Thursday, November 28, 2013 at 3:09pmPERPENDICULAR

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