Answer:
[tex]4^2=5^2+7^2-2(5)(7) cos A\\\\[/tex]
[tex]A=34.0^o[/tex]
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[tex]\frac{4}{Sin34^o} =\frac{5}{SinB} \\\\[/tex]
[tex]B=44.4^o[/tex]
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[tex]7^2=4^2+5^2-2(4)(5)CosC[/tex]
[tex]C= 101.5^o[/tex]
[tex]---------[/tex]
hope it helps...
have a great day!!
