Answer:
There are six trigonometric function, the first three are mainly used and other three are not use often, they are:
They are mainly the ratio of two side of triangle.i.e.
[tex]Sin x = \dfrac{Perpendicular}{Hypotenuse}[/tex]
[tex]Cos x = \dfrac{Base}{Hypotenuse}[/tex]
[tex]Tan x = \dfrac{Perpendicular}{Base}[/tex]
[tex]Cosec x = \dfrac{Hypotenuse}{Perpendicular}[/tex]
[tex]Sec x = \dfrac{Hypotenuse}{Base}[/tex]
[tex]Cot x = \dfrac{Base}{Perpendicular}[/tex]
On the basis of these ratios there are different relations defined in Trigonometry Chapter.
Answer:
length of chords
Explanation:
In the study of the earth and astronomy, mathematicians developed trigonometric functions as lengths of chords in a circle, not as ratios. The mathematician Ptolemy calculated chord lengths by inscribing regular polygons in a circle. Remarkably, he was able to calculate these lengths to an accuracy of about five decimal places. Ptolemy's table of chords is equivalent to our table of sine values. In this lesson, you will begin to see the relationship between the trigonometric functions and the circle.
