How do you evaluate the expression cot45? Trigonometry Right Triangles Trigonometric Functions of Any Angle 1 Answer Noah G Oct 7, 2016 cot45˚ = 1 Explanation: cottheta = 1/tantheta cot45˚= 1/tan45˚ We use the 45-45-90 special triangle to find the value of tan45˚. tantheta = "opposite"/"adjacent" = 1/1 = 1 cot45˚ = 1/tan45˚ = 1/1 = 1 Hopefully this helps! 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 3438 views around the world You can reuse this answer Creative Commons License