Which mnemonic helps remember the sine, cosine, and tangent ratios?

Which mnemonic helps remember the sine, cosine, and tangent ratios?

• A. SOH-CAH-TOA
• B. CAH-SOH-TOA
• C. SOH-CAH-OTA
• D. SOH-TOA-CAH

Answer: (A)

In a right triangle, remember the three core ratios by linking each function to its two sides. SOH-CAH-TOA encodes them perfectly: Sine is Opposite over Hypotenuse, Cosine is Adjacent over Hypotenuse, and Tangent is Opposite over Adjacent. That exact order—S-O-H, C-A-H, T-O-A—lets you recall all three definitions quickly and correctly. The other strings mix up the order of the parts or swap the roles of opposite, adjacent, and hypotenuse, so they don’t align with the standard definitions.

In a right triangle, remember the three core ratios by linking each function to its two sides. SOH-CAH-TOA encodes them perfectly: Sine is Opposite over Hypotenuse, Cosine is Adjacent over Hypotenuse, and Tangent is Opposite over Adjacent. That exact order—S-O-H, C-A-H, T-O-A—lets you recall all three definitions quickly and correctly. The other strings mix up the order of the parts or swap the roles of opposite, adjacent, and hypotenuse, so they don’t align with the standard definitions.