Friday
April 18, 2014

Homework Help: math

Posted by Rose on Sunday, April 7, 2013 at 8:56am.

A plane leaves hamilton and flies due east 75 km at the same time a second plane flies in a direction of 40degress southeast for 120 km how far apart are the planes when they reach their destination.
I say the calculation is 75^2+120^2-2(75)(120)cos40
the book says to use cos 45 is this a typo or am I missing something???

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