Mathematics

The reciprocal ratios flip the fraction that defines each trigonometric function. For $\sin A$, think about which ratio has the hypotenuse in the numerator instead of the denominator—that's your reciprocal. Similarly, $\tan A$ pairs with a ratio where you swap opposite and adjacent sides. These reciprocals have their own names, so recognizing the pattern helps you name them instantly.

The reciprocal ratios flip the fraction that defines each trigonometric function. For $\sin A$, think about which ratio has the hypotenuse in the numerator instead of the denominator—that's your reciprocal. Similarly, $\tan A$ pairs with a ratio where you swap opposite and adjacent sides. These reciprocals have their own names, so recognizing the pattern helps you name them instantly.