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trigonometry ka parichay class 10th | trigonometry ka parichay chapter 8 (10th class math) | introduction of trigonometry

Introduction to Trigonometry.
Trigonometry, as the name might suggest, is all about triangles. More specifically, trigonometry is about right-angled triangles, where one of the internal angles is 90°.Trigonometry is a system that helps us to work out missing sides or angles in a triangle.......

What do you mean by trigonometry?
Introduction to trigonometry. As you see, the word itself refers to three angles - a reference to triangles. Trigonometry is primarily a branch of mathematics that deals with triangles, mostly right triangles. In particular the ratios and relationships between the triangle's sides and angles..

Who introduced trigonometry?

Hipparchus of Nicaea

The first trigonometric table was apparently compiled by Hipparchus of Nicaea(180 – 125 BCE), who is now consequently known as "the father of trigonometry."Hipparchus was the first to tabulate the corresponding values of arc and chord for a series of angles..

Why was trigonometry invented?

For his astronomical work Hipparchus needed a table of trigonometric ratios. It is believed that he computed the first table of chords for this purpose. ... After Hipparchus the next Greek mathematician known to have made a contribution totrigonometry was Menelaus. We know very little about the life of Menelaus..

How do you trigonometry?

If you know the lengths of two sides of a triangle, you can calculate the value of angle "θ" using trigonometry. The functions of sin, cos and tan can be calculated as follows: Sine Function: sin(θ) = Opposite / Hypotenuse. Cosine Function: cos(θ) = Adjacent / Hypotenuse.

What is the brief history of trigonometry?

Taken from the Greek words trigonon (triangle) and metria (measure), the word literally means triangle measurement and the term came into use in the 17th century—the period when trigonometry, as an analytic science, started; but its real origins lie in the ancient Egyptian pyramids and Babylonian astronomy that date ...