SOHCAHTOA is a very useful mnemonic that can help students remember the sine ratio, cosine ratio, and the tangent ratio of the three basic trigonometric functions sine, cosine, and tangent.

SOH : Sine = Opposite / Hypotenuse 

CAH : Cosine = Adjacent / Hypotenuse 

TOA : Tangent = Opposite / Adjacent 

Below, we show a nice figure that will help you greatly to remember sohcahtoa.


Opposite means opposite to the angle θ and adjacent means adjacent or next to the angle θ.

You could also use the following mnemonic to remember the trigonometric ratios.

" Some Old Hog Came Around Here and Took Our Apples."

An example showing how to use sohcahtoa

Sin(θ) = 6/10 = 0.6

Cos(θ) = 8/10 = 0.8

Tan(θ) = 6/8 = 0.75

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