Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
The cosine of 1/x is a trigonometric function where x is in radians. As x becomes larger (closer to positive infinity), 1/x becomes infinitesimally small, causing oscillations in the cosine values.