Is SOHCAHTOA the same as trigonometry?

It is the right-angled case. The sine rule and cosine rule are the Higher extension when there is no right angle.

Which GCSE papers use SOHCAHTOA?

Any paper can. On a non-calculator paper you may be asked for a ratio or an exact value rather than a decimal angle.

Should I write SOHCAHTOA on the exam paper?

Write the fraction you are using, with the sides named. The mnemonic itself earns nothing.

SOHCAHTOA GCSE Maths questions — right-angled triangles

SOHCAHTOA GCSE Maths questionsSOHCAHTOA GCSE Maths questions: pick sine, cosine or tangent from the sides you know, then find a missing side or angle. Original marked items, not a worksheet PDF.Start free GCSE Maths test · Pricing