Use this formula to multiply the degree value times pi and divide the value by 180. Confirm your entry by clicking "OK" and the corresponding tangent value will appear in the first tangent cell.

Trigonometry Table is a table that helps us to calculate the values of trigonometric ratios for common angles such as 0°, 30°, 45°, 60°, and 90°. But it is difficult to memorise the values.

Bai-Ni Guo, Dongkyu Lim, Feng Qi, MACLAURIN’S SERIES EXPANSIONS FOR POSITIVE INTEGER POWERS OF INVERSE (HYPERBOLIC) SINE AND TANGENT FUNCTIONS, CLOSED-FORM FORMULA OF SPECIFIC PARTIAL BELL POLYNOMIALS ...

The equation has to contain 𝒐 and 𝒂 because these are the sides with information in the diagram. The only equation that contains both 𝒐 and 𝒂 is the tangent (tan) ratio.