use a sine function, not a tangent, since you have the hypotenuse and
the side opposite the angle given.
side note: tan and sine of relatively small angles are just about
the same number since tan = sin/cos and cos of small angles is close
to 1.0
-Roland
On Thu, 9 Apr 2009 19:32:24 EDT, you wrote:
::In a message dated 4/9/09 12:49:19 P.M. Pacific Daylight Time,
::cak@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.
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Shop-talk mailing list
http://autox.team.net/mailman/listinfo/shop-talk
http://www.team.net/archive
|