How do you evaluate the expression csc(-60)? Trigonometry Right Triangles Trigonometric Functions of Any Angle 1 Answer sankarankalyanam Mar 17, 2018 color(brown)(csc (-60) = - 1/ sin 60 = - 2/ sqrt3 Explanation: csc (-60) = csc (-(pi/3)) = csc (2pi - (pi/3) It falls in IV quadrant where in cos , sec alone are positive. :. color(indigo)(csc (-60) = - csc (60) = - 1 / sin 60 = -1 / (sqrt3/2) = - 2 / sqrt3 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 3286 views around the world You can reuse this answer Creative Commons License