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Law of Cosine formula not working

BB_14100646
10-Marble

Law of Cosine formula not working

I'm using MathCAD 9.0.0.0. I'm not sure why I'm getting the wrong answer. The calculation should be...

BB_14100646_0-1759947481813.png

R = 329.687 N

...but I'm getting...

BB_14100646_1-1759947573578.png

R = 108695.156 N

Is there something wrong with my settings?

 

Thanks,

    Brent 

ACCEPTED SOLUTION

Accepted Solutions
Werner_E
25-Diamond I
(To:BB_14100646)

Law of cosine is R2=P2+... and NOT R=P2+...

So you have to use the square root to get R

Werner_E_0-1759948568463.png

 

 

View solution in original post

2 REPLIES 2
Werner_E
25-Diamond I
(To:BB_14100646)

Law of cosine is R2=P2+... and NOT R=P2+...

So you have to use the square root to get R

Werner_E_0-1759948568463.png

 

 

Thank you again!!!!

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