Question

Determine the unknown side length using the law of cosines. Please help, thank you!

Answer 1

x = \sqrt{7^{2} + 5^{2} - 2 .7.5.cos 42} = ~4.689

Explanation:

Answer 2

x =
`\sqrt{7^(2) + 5^(2) - 2 .7.5.cos 42}` = ~4.689

Hope you find it useful, bro!