cofunctions
/koʊˈfʌŋkʃənz/
noun
- In trigonometry, pairs of functions (like sine and cosine, tangent and cotangent) that are equal when their angles are complementary (sum to 90 degrees).
- Learning cofunctions helps simplify trigonometric expressions.
- The teacher explained that tangent and cotangent are cofunctions.
- Sine and cosine are cofunctions because sin(30°) equals cos(60°).