How do I know when to use sine, cos or tan when working with right angled triangles?

When dealing with right angled triangles, you just need to remember 'SOHCAHTOA'. If you struggle to remember this, you may find it easier to recall:'Some Of Her Children Are Having Trouble Over Algebra'.Steps to solve: 1) Label triangle. 2) Write out SOH CAH TOA in triangle shape and circle the appropriate triangle 3) Rearrange triangle to solve for the unknown and apply formula