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September 20, 2014

September 20, 2014

Posted by **Adrianna** on Saturday, March 17, 2012 at 9:29pm.

A.650.66 miles

B.1,160 miles

C.1,301 miles

- Pre-Cal -
**Reiny**, Saturday, March 17, 2012 at 9:48pmUse the cosine law, I got 650.66

- Pre-Cal -
**Adrianna**, Saturday, March 17, 2012 at 9:51pmCan you tell me how you did it? I got 5 more questions like this one.

- Pre-Cal -
**Reiny**, Saturday, March 17, 2012 at 9:53pmare you not familar with the cosine law?

You must have learned this to be able to do this kind of question.

- Pre-Cal -
**Adrianna**, Saturday, March 17, 2012 at 9:58pmYes I am, but I don't understand it. I don't have a teacher to teach me. I do my work online, and I just need 2nd semester of pre-cal to graduate.

- Pre-Cal -
**Reiny**, Saturday, March 17, 2012 at 10:02pmx^2 = 420^2 + 400^2 - 2(420)(400)cos 105°

do the arithmetic

I got 105° from the difference between 150° and 45°

- Pre-Cal -
**Adrianna**, Saturday, March 17, 2012 at 10:07pmthanks

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