Question

What is trigonometry function?

Answer 1

Following are six trigonometric functions
$\begin{array}{cccc}Function& Abbreviation& Description& Identities\left(usingradians\right)\\ sine& sin& opposite/hypotenuse& sin\theta =cos(\frac{\pi }{2}-\theta )=\frac{1}{csc\theta }\\ cosine& cos& adjacent/hypotenuse& cos\theta =sin(\frac{\pi }{2}-\theta )=\frac{1}{sec\theta }\\ tangent& tan\left(ortg\right)& opposite/adjacent& tan\theta =\frac{sin\theta }{cos\theta }=cot(\frac{\pi }{2}-\theta )=\frac{1}{cot\theta }\\ cotangent& cot\left(orcotanorcotgorctgorctn\right)& adjacent/opposite& cot\theta =\frac{cos\theta }{sin\theta }=tan(\frac{\pi }{2}-\theta )=\frac{1}{tan\theta }\\ secant& sec& hypotenuse/adjacent& sec\theta =csc(\frac{\pi }{2}-\theta )=\frac{1}{cos\theta }\\ cosecant& csc\left(orcosec\right)& hypotenuse/opposite& csc\theta =sec(\frac{\pi }{2}-\theta )=\frac{1}{sin\theta }\end{array}$