Trigonometric Functions
- Acos
- Arccosec
- Arccosecant
- Arccosine
- Arccotangent
- Arcctg
- Arcsecant
- Arcsine
- Arctangent
- Arctg
- Arcth
- Arsh
- Arth
- Asin
- Atan
- Circular Functions
- Cohavercosine
- Cohaversine
- Cosecant
- Cosine
- Cosine Constant
- Cosine Fixed Point Constant
- Cosine Superposition Constant
- Cotangent
- Cotes Circle Property
- Covercosine
- Coversine
- Ctg
- Ctn
- Dottie Number
- Elliptic Cosine
- Elliptic Sine
- Euler's Continued Fraction
- Euler's Machin-Like Formula
- Excosecant
- Exsecant
- Gauss's Machin-Like Formula
- Gregory Number
- Gudermannian
- Hacovercosine
- Hacoversed Cosine
- Hacoversed Sine
- Hacoversine
- Havercosine
- Haversed Cosine
- Haversed Sine
- Haversine
- Hermann's Formula
- Hutton's Formula
- Inverse Circular Functions
- Inverse Cosecant
- Inverse Cosine
- Inverse Cotangent
- Inverse Gudermannian
- Inverse Secant
- Inverse Sine
- Inverse Tangent
- Inverse Trigonometric Functions
- Iterated Cosine Constant
- Law of Cosines
- Law of Sines
- Law of Tangents
- Lehmer's Constant
- Lehmer Cotangent Expansion
- Leibniz Series
- Machin's Formula
- Machin-Like Formulas
- Niven's Theorem
- Osborn's Rule
- Power-Reduction Formulas
- Secant
- Sinc Function
- Sine
- Sinhc Function
- Sinusoid
- Strassnitzky's Formula
- Tanc Function
- Tangent
- Tanhc Function
- Trigonometric Functions
- Trigonometric Power-Reduction Formulas
- Trigonometric Product Formulas
- Vercosine
- Versed Cosine
- Versed Sine
- Versine