What is the exact value of sec (-30)? Trigonometry Right Triangles Trigonometric Functions of Any Angle 1 Answer Nghi N. Jun 9, 2015 Find sec (-30) Explanation: sec (-30) = 1/cos (-30) On the trig unit circle, cos (-30) = cos (30) = (sqrt3)/2 sec (-30) = 2/(sqrt3) = (2sqrt3)/3 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 5193 views around the world You can reuse this answer Creative Commons License