For a right angle triangle the formulae are:-
Sine = opposite/hypotenuse
Cosine = adjacent/hypotenuse
Tangent = opposite/adjacent
An easy way to remember them is: SOH-CAH-TOA
No, because trigonometry is a big subject: there are many formulae.
SOH KAH TOA
There are many formulae in trigonometry, not just three. So the question cannot be answered without knowing which three you mean.
right angled triangle have only three angles and three sides therefore we have three formulae for finding the ratio of three sides but when we have to find the inverse of all we Get three more formulae therefore 3+3=6(personal opinion_)
Some of them are as follows:- Different types of angles Pythagoras' theorem Trigonometry Different types of polygons Measurements Volume Properties of a circle Properties of 2 and 3 dimensional shapes Tessellation Formulae
What are the conventional formulae?
plane trigonometry spherical trigonometry
The main kinds are plane trigonometry and solid trigonometry. The latter will include trigonometry in hyper-spaces.
There are thousands of mathematical formulae.
If the vertices are at (0, -2) (8, -2) and (9, 1) on the Cartesian plane plane then by using the distance formulae and trigonometry the area of the triangle works out as 12 square units.
Hipparchus is the father of trigonometry.
It is a number - in trigonometry or elsewhere.