May 24, 2016

Homework Help: trig

Posted by Sandy on Thursday, February 17, 2011 at 3:35pm.

From two points each on the opposite sides of a river,the angles of elevations of the top of an 80ft. tree are 60 degree & 30 degree.the points & the tree are in the same straight line,which is perpendicular to the river.how wide is the river?

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