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Law of Cosines

Given that a=8,  b=5  and  c=9a=8,\ \ b=5\ \ and\ \ c=9

Find A∠A

Given that  a=7,  b=9  and  c=4.a=7,\ \ b=9\ \ and\ \ c=4.

Find B∠B

 Find Angle "C" Using The Law of Cosines.



What is Angle "C" ?




 Given that  a=9,  c=17  and B=106°a=9,\ \ c=17\ \ and\ ∠B=106°

Find length b.

Is the sentence true or false?

c2=a2+b22abcos(C)c^2=a^2+b^2-2ab\cos(C)

Given that a=9.4,  b=6.5  and  C=131°a=9.4,\ \ b=6.5\ \ and\ \ ∠C=131°

Find length c.

Given that  a=8.1,  b=6.3  and  c=9.6a=8.1,\ \ b=6.3\ \ and\ \ c=9.6

Find B∠B

Given that a=3.6,  b=5.3  and  C=59°.a=3.6,\ \ b=5.3\ \ and\ \ ∠C=59°.

Find length c.

Given that c=7,a=4  and  B=75°c=7,a=4\ \ and\ \ ∠B=75°

Find length b.