Trig Word Problems

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kbryant9

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In order to get around an obstruction, an oil pipeline is constructed in two straight sections, one 3.756 km long and the other 4.675 km long, with an angle of 168.85 degrees between the sections where they are joined. How much more pipeline was necessary due to the obstruction?
 


Please do not post exercises without asking any questions of your own. How are we supposed to know where you're stuck? :?

I mean, how far did you get? Do you understand the question?

You need to consider a triangle, using the two given sides and the included angle. (Draw a picture.)

They are asking for the difference between (1) the sum of the two known sides and (2) the length of the unknown side.

 
Thank you for the reply. I did not know how to get started (which method to use) due to the fact that my assignment was a variety of random problems throughout an entire trig textbook.
 
Have you gotten started with the "Law of Cosines" hint?.
 
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