How do you find tan pi/4 in terms of radians? Trigonometry Right Triangles Trigonometric Functions of Any Angle 1 Answer Alan P. Sep 24, 2015 tan(pi/4 "( radians)") = 1 Explanation: Note that it is the measure of the angle (i.e. pi/4 that is measured in radians [as opposed, for example, to being measured in degrees) and not the value of tan tan= ("opposite")/("adjacent") = 1/1 = 1 Answer link Related questions How do you find the trigonometric functions of any angle? What is the reference angle? How do you use the ordered pairs on a unit circle to evaluate a trigonometric function of any angle? What is the reference angle for 140^\circ? How do you find the value of cot 300^@? What is the value of sin -45^@? How do you find the trigonometric functions of values that are greater than 360^@? How do you use the reference angles to find sin210cos330-tan 135? How do you know if sin 30 = sin 150? How do you show that (costheta)(sectheta) = 1 if theta=pi/4? See all questions in Trigonometric Functions of Any Angle Impact of this question 4450 views around the world You can reuse this answer Creative Commons License