SOH CAH TOA: A Math Mnemonic to Remember Trigonometric Ratios

By Team Aakash Byju's

The sine, cosine, and tangent ratios in a right triangle are remembered by expressing them as strings of letters, SOH-CAH-TOA in English.

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SOH means sine-opposite-hypotenuse i.e., for an angle, in a right triangle.

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CAH means cos-adjacent-hypotenuse i.e., for an angle, in a right triangle.

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TOA means tan-opposite-adjacent i.e., for an angle, in a right triangle.

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Refer to this image for better understanding:

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Mnemonics help to remember trigonometric identities & the relationships between the various trigonometric functions.

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To remember the same trigonometric ratios there are other mnemonics also. For example:

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