Friday

August 22, 2014

August 22, 2014

Posted by **Winsel** on Saturday, August 14, 2010 at 1:30am.

- trigonometry -
**Reiny**, Saturday, August 14, 2010 at 9:09amI will help you with the diagram, after that it is easy.

Draw a vertical line AB, the tower, where A is the position of the man and B is the base of the tower.

AB = 73.5

Draw another vertical line CD, for the tree, C as the top and D as the bottom

Mark E on CD as the same height as AB

clearly AE = BD

and ED = AB , all we need is CE

angle (CAE) = 12.66667°

angle(EAD) = 70.3333° making angle (BAD) = 19.66667°

You now have 2 nice right-angled triangles, where you can find BD, and its an easy ride after that

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