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SOHCAHTOA — Eduqas GCSE Mathematics Definition | GradeGen

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Mathematics
Key terms
SOHCAHTOA

GCSE Mathematics · key term

SOHCAHTOA

Definition

A memory aid for $\sin\theta=O/H$ , $\cos\theta=A/H$ and , where the letters represent opposite, adjacent and hypotenuse.

How each exam board covers it

Eduqas GCSE Mathematics · C300

Specification HG20 · Paper 1, Paper 2

The memory aid SOHCAHTOA groups the letters into SOH, CAH and TOA: sine uses opposite over hypotenuse, cosine uses adjacent over hypotenuse, and tangent uses opposite over adjacent.
Revise: Right-Angled Trigonometry

Eduqas Mathematics past papers

Exam tips

1
Check that the triangle is right-angled before using SOHCAHTOA.

Related key terms

Adjacent side
Hypotenuse
Inverse trigonometric function
Opposite side
Right-angled triangle

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\tan\theta=O/A

Used by Eduqas

Trigonometric ratio