trigonometric function
三角関数
All Students Take Calculus – a mnemonic for recalling the signs of trigonometric functions in a particular quadrant of a Cartesian plane
Bhaskara I's sine approximation formula
Differentiation of trigonometric functions
Generalized trigonometry
Generating trigonometric tables
Hyperbolic function
List of integrals of trigonometric functions
List of periodic functions
List of trigonometric identities
Polar sine – a generalization to vertex angles
Proofs of trigonometric identities
Versine – for several less used trigonometric functions
/suto3/google.icontrigonometric function
image trigonometric function
define trigonometric function
wikipedia trigonometric function
weblio trigonometric function
kotobank trigonometric function
jisho trigonometric function