anonymous
  • anonymous
What is the formula for solving a triangle with the law of cosines if you have all the side lengths but need to find the angles?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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amistre64
  • amistre64
c^2 - a^2 - b^2 -------------- = cosC 2ab
amistre64
  • amistre64
its the law of cosines solved for cosC
amistre64
  • amistre64
to get the angle youll need to take the consine inverse tho... and keep in mind that cos^-1 spits an angle out in the range of 0 to pi...so adjust as needed

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amistre64
  • amistre64
hah... i see a typo
amistre64
  • amistre64
/-2ab... | c^2 - a^2 - b^2 | cos^-1 |--------------- | = C ; adjusted of course | -2ab |

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