7. + 0.22 points LarPreCalcRMRPAt6 7.2.008. In the triangle below, x = 9, Use th

Question

7. + 0.22 points LarPreCalcRMRPAt6 7.2.008. In the triangle below, x = 9, Use the Law of Cosines to solve the triangle 18 cm 12 Need Help? Readis Talk toa Titer 8. + 0.22 points RPAt6 7.2.016 Use the Law of Cosines to solve the triangle. (Round your answers to two decimal places.) C 1050, a 19, b = 5 Need Help?Read ItTalk to a Tutor 9. + 0.22 points 7.2.032. Determine whether the Law of Sines or the Law of Cosines can be used to find another measure of the triangle a= 10, b= 13, C=68" o Law of Sines Law of Cosines Then solve the triangle. (Round your answers to four decimal places.) Need Help?Read It Watch It Talk to a Tutor Viewing Saved Work Revert to Last Response

Explanation / Answer

7.a =9, b=18, c=12

Using cosine law

a2=b2+c2-2bc cos A

92=182+122-2(18)(12)cos A

81=324+144-432 cos A

cos A= 387/432

A=26.38 degree

b2=c2+a2-2ac cos B

182=122+92-2(12)(9)cos B

324=144+81-216cosB

cos B=-99/216

B=117.28 degree

C=180-A-B=36.34 degree

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