where does sine cosine and tangent come from
Sine The function sine can be traced to the jyā and koṭi-jyā functions used in Gupta period Indian astronomy (Aryabhatiya, Surya Siddhanta), via translation from Sanskrit to Arabic and then from Arabic to Latin.[1] The word "sine" comes from a Latin mistranslation of the Arabic jiba, which is a transliteration of the Sanskrit word for half the chord, jya-ardha.[2]
Trigone of urinary bladder The trigone (a.k.a. vesical trigone)[1] is a smooth triangular region of the internal urinary bladder formed by the two ureteric orifices and the internal urethral orifice.