Point xy on the terminal side of t and r x2 y2. These are the only two angles within 0x. Trigonometric Function Values Of Special Angles Mov Trigonometric Functions Math Formulas Education Math The tangent of an angle in a right triangle is equal to the length of the opposite side O divided by the length of the adjacent side A. . If the elevation of the Sun changed from 30 to 60 then the difference between the lengths of. As you can see below the inverse tan -1 1 is 45 or in radian measure Π4. The period of the tanθ tan θ function is π π so values will repeat every π π radians in both directions. However tan-1 x is not equal to tan x-1 1 tan x cot x. It is written simply as tan in a formula. Equals sin x divided by cos x. This website uses cookies to improve your experience analyze traffic and display ads. Arctan can also be written as arctan x or tan-1 x. What does tan x equals. Extended ...