How do I find the value of sec-240?
1 Answer
Mar 3, 2018
- 2
Explanation:
cos (-240) = cos (120 - 360) = cos 120.
Unit circle gives --> cos 120 = - 1/2
Finally,
sec (-240) = - 2
cos (-240) = cos (120 - 360) = cos 120.
Unit circle gives --> cos 120 = - 1/2
Finally,
sec (-240) = - 2