Question

Please helppp.

Answer 1

Use the law of cosines.

Answer 2

\[\cos C=\frac{ a ^{2}+b ^{2}-c ^{2} }{2ab }\]

Answer 3

\[\tan \theta = \frac{ Opposite }{Adjacent }\]
\[\theta=\sin^{-1} \frac{ Opposite }{ Adjacent } \]

Answer 4

\[\cos C=\frac{ 9.8^{2}+10.2^{2}-5.7^{2} }{2*9.8*10.2 }\]

Answer 5

here C=theta