Which of the following is NOT a part of SOHCAHTOA?

The concept of SOHCAHTOA is a mnemonic device that helps remember the relationships between the sides and angles of a right triangle. It specifically refers to three trigonometric ratios: sine, cosine, and tangent.

In this context, sine refers to the ratio of the length of the opposite side to the hypotenuse (SOH), cosine refers to the ratio of the length of the adjacent side to the hypotenuse (CAH), and tangent refers to the ratio of the length of the opposite side to the adjacent side (TOA). Each of these ratios plays a fundamental role in trigonometry, particularly in solving problems involving right triangles.

The secant ratio, however, is not included in the SOHCAHTOA acronym. Secant is defined as the reciprocal of the cosine function and represents the ratio of the hypotenuse to the adjacent side. While it is indeed a trigonometric ratio, it does not fall under the traditional definitions encapsulated by SOHCAHTOA, which focuses solely on sine, cosine, and tangent.

Thus, the secant ratio is identified correctly as not being a part of SOHCAHTOA. Understanding this distinction is crucial for grasping the foundational elements of trigon