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I am trying to find the resultant vector made by 115 km at 80 degrees and 85 km at 15 degrees. I have been using the graphing method my teacher showed me. I want to use law of cosines or law of sines, but I have two unknowns. The answer is probably right under my nose.

If you could help me understand this problem, it would be greatly appreciated! Thank you for your help!

Katie Jo