Tan C
Tangent (tan) function - Trigonometry. ... In a right triangle, the tangent of an angle is the length of the opposite side divided by the length of the adjacent side.
Tan A
The tangent function, along with sine and cosine, is one of the three most common trigonometric functions. ... In any right triangle, the tangent of an angle is the length of the opposite side (O) divided by the length of the adjacent side (A). In a formula, it is written simply as 'tan'.