Question

How do you do this, I think it might be that a^2 + b^2 stuff but I’m not sure

Answer 1

Note: Sine Rule

`(a)/(sinA)=(b)/(sinB)=(c)/(sinC)`

From the question, we have

`\begin{gathered} (22)/(sin31)=(b)/(sin66) \\ \\ b=(22sin66)/(sin31) \\ \\ b=39.0 \end{gathered}`

The answer is