Solve: Ok, so I use the law of cosines, correct? Now, when I input this into my ti83+: I get -1.86075644e13 So, next I am supposed to multiply by the inverse cosine, right? But -1.8 is obviously not right, so what am I doing wrong?
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Originally Posted by coasterguy Solve: Ok, so I use the law of cosines, correct? Now, when I input this into my ti83+: I get -1.86075644e13 So, next I am supposed to multiply by the inverse cosine, right? But -1.8 is obviously not right, so what am I doing wrong? check that your calculator is in degree mode. here's how it should look on your home screen ...
Originally Posted by skeeter check that your calculator is in degree mode. here's how it should look on your home screen ... Thank you!
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