Posted by Tareena check my answer please on Saturday, May 24, 2008 at 4:39pm.
Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h
The angle between their flight paths is 75 degrees after three hours, how fart apart are they?

Math  drwls, Saturday, May 24, 2008 at 5:12pm
I don't see your answer to check.
The law of cosines would work well on this problem. You know two sides (900 and 1260 km) and the included angle (75 deg) of a triangle.

Math  Tareena check my answer please, Saturday, May 24, 2008 at 5:29pm
so it would be c^2=a^2+b^22ab cos C
900^2+1260^22(900)(1260)(cos75)
c^2=33542.9
c=183.14km
is it right?

Math  Tareena drwls check my answer please, Saturday, May 24, 2008 at 5:33pm
thanks

Math  drwls, Sunday, May 25, 2008 at 1:08am
No. It isn't right. See my answer to your later post.
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