How do you solve 13^2=8^2+6^2-2(8)(6)cosA?
2 Answers
Sep 23, 2017
Explanation:
"isolate "cosA" by evaluating the numeric values"
rArr169=64+36-96cosA
rArr-96cosA=69
rArrcosA=-69/96=-23/32
rArrA=cos^-1(-23/32)=136^@
Sep 23, 2017
Or
Explanation:
Since
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