[Shop-talk] math wizards ??? come here

[ScottyGrover at aol.com]

In a message dated 4/9/09 12:49:19 P.M. Pacific Daylight Time,  
cak at dimebank.com writes:

> You  need a few more pieces of information in order to do the trig.   

Not really ... as Randall pointed out, 'similar triangles' gets
it  done with what he's got, since all the ratios remain the  same.



Only if the boom has a slide on it, allowing the boom to lengthen as it  
rises;  Given that he has the length from the hinge to the hook and  the  
length from the hinge to the jacking point, a trig. table or a  scientific 
calculator should give  the angle of which the tangent is  1"/12"; then that 
angle's tangent, multiplied by 96" should give the height  of the hook above 
level.
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