As the numbers are known on the opposite and the hypotenuse, then we look for the ratio which uses both these sides (SOH CAH TOA). That ratio is the sine ratio. \(\sin (x^\circ ) = ...
Read the question through twice. Highlight or underline the important pieces of information in the question. Use the answer to step C to work out the value of the angle highlighted. \(x = 13\) so ...