Mnemonic/Catalogs/List of mnemonics in English

Mathematics

 * Sin = Obtuse / Hypotenuse; Cosine = Adjacent / Hypotenuse; Tangent = Obtuse / Adjacent
 * SOH CAH TOA

Science

 * The colors of the rainbow: red, orange, yellow, green, blue, indigo and violet.
 * Richard of York gave battle in vain.