TRIGONOMETRY (soh cah toa)
SOHCAHTOA
The three definitions you need to remember are. These can be remembered using the made up word SOHCAHTOA:
(SOH)
(CAH)
(TOA)
They can also be remembered using three triangles:
Cover up the bit you are being asked to find with your finger, then:
If the other two are next to each other - multiply them
If the other two are on top of each other – divide them (O/H or A/Cosθ etc)