# Trigonometric Ratios In a Right Triangle Calculator

An online calculator to calculate trigonometric ratios in a right triangle is presented. Activities involving some fundamenatl trigonometric ratios are also included.

## How to use the calculator

1 - Enter the two sides $a$ and $b$ that make the right angle as positive real number and the number of decimal places desired then press "Enter". Side $C$ is calculated and the 6 trigonometric ratios defined in trigonometry.

 $a$ = 4 $b$ = 3 Decimal Places = 3

## Activities

Use the values of the six trigonometric ratios above and your own calculator to verify the following identities
$\sin^2(A) + \cos^2(A) = 1$
$\tan(A) = \dfrac{\sin(A)}{\cos(A)}$
$\cot(A) = \dfrac{1}{\tan(A)}$
$\sec(A) = \dfrac{1}{\cos(A)}$
$\csc(A) = \dfrac{1}{\sin(A)}$
$\tan^2(A) + 1 = \sec^2(A)$
$\cot^2(A) + 1 = \csc^2(A)$

More
Trigonometry Calculators and Solvers .