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 ) = \frac{{opposite}}{{ ...

And the opposite is opposite the acute angle given. We can use trigonometry CLIMBER:'to calculate the lengths of sides and sizes of angles in the triangle. We do this by remembering SOH CAH TOA.