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August 21, 2014

August 21, 2014

Posted by **Brian** on Sunday, October 16, 2011 at 11:50pm.

- math -
**Steve**, Monday, October 17, 2011 at 1:52pmDraw a diagram. Draw your line straight north from A, and a line east from A of length 4. The hypotenuse is the speed of the boat, 9.

That is, for every 9 miles the boat travels in the desired direction, it will drift 4 miles west. ending up directly north of A.

So, the angle a, reckoning from the north direction is such that

sin(a) = 4/9 = .4444

so, a = N 26.4° E

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