# Algebra 2; Trigonometric Formulas

 What are the 3 basic Trigonometric Formulas? I. Sine (sin) [read as sign] II. Cosine (cos) [read as co-sign] III. Tangent (tan) [read as it written] Side c: Hypotenuse Always the opposite of the right angle. Sin, Cos, and Tan are used depending on the angles and measurements given. Sin = Opposite Side (of referenced angle) / Hypotenuse Cos = Adjacent Side (of referenced angle) / Hypotenuse Tan = Opposite Side / Adjacent Side How to remember these functions ? S O H - C A H - T O A The initial letter of each set represents the functions, O represents Opposite, A represents Adjacent, and H represents Hypotenuse. The other three functions are: I. Cotangent (cot) II. Secent (sec) III. Cosecent (csc) It turns out that the three functions referenced in the last card are the repirocals of the first three functions that were introduced. Cot =_____1_____ Tangent Sec =_____1_____ Cosine Csc =_____1_____ Sine AuthorPaynefan ID64022 Card SetAlgebra 2; Trigonometric Formulas DescriptionQuick Notes on the 6 different types of Trigonometric Formulas, and a few rules about them. Updated2011-02-05T01:28:12Z Show Answers