Definition:Co-/Complementary Angles
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Complementary Angles
The prefix co- stands for complementary angles.
Specifically it refers to the trigonometric function of the complementary angle of a given trigonometric function:
- Cosine is the sine of the complementary angle
- Cotangent is the tangent of the complementary angle
- Cosecant is the secant of the complementary angle.
Sources
- 1953: L. Harwood Clarke: A Note Book in Pure Mathematics ... (previous) ... (next): $\text V$. Trigonometry: Complementary angles