Answer:
13.31803792
Step-by-step explanation:
Law of Cosines
a= 8
b= 18
c= ?
[tex]c^2=a^2b^2-2ab*cos(c)[/tex]
[tex]c^2=8^2-18^2-2*8*18*cos(43)[/tex]
c = 64 + 324 - 2 * 8 * 18 * cos(43)
cos(43) = 0.7313537016
Order of Operations
64 + 324 - 2 * 8 * 18 * 0.7313537016 = 177.3701339
Square Root the answer
[tex]\sqrt{177.3701339}[/tex] = 13.31803792
