Answer by
willard (874)

SOHCAHTOA is a neumonic device for remembering the definition of the basic trig functions in terms of the sides of a right triangle - the side Opposite the angle, the side Adjacent to the Angle, and the
long side, known as the Hypotenuse. To wit,
S(in) = O(pposite)/H(ypotenuse), C(os)=A(djacent)/H(ypotenuse), T(angent)=O(pposite)/A(djacent)

it's "mnemonic" and it's SOCATOA as written in the question... add a comment

Actually it's SOHCAHTOA because SOCATOA would imply that there is no hypotenuse involved anywhere, which is not true. add a comment

Mnemonic device, bot neumonic add a comment