Step-by-step explanation:
In a triangle:
b=3 ; a=9 ; c=11
We want to determine the value of Angle C.
Since we are given three sides of the triangle, we use the Law of Cosines to find any of the angles.
i don't know, but that looks pretty bad. my school passed us unless we failed in all the subjects, but idk abt ur school's rules.
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