Thursday, March 14, 2013

Download HSEB Notes of Mathematics | Trigonometry and Trigonometric Function | Extra Reference | E-Book | Class 11

MATHEMATICS | EXTRA REFERENCE | E-BOOK
DOWNLOAD HSEB NOTES ON TRIGONOMETRY AND TRIGONOMETRIC FUNCTION | MATHEMATICS
CLASS : 11
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Introduction
The word ‘trigonometry’ is derived from the Greek words ‘trigon’ and ‘metron’ and it means ‘measuring the sides of a triangle’. The subject was originally developed to solve geometric problems involving triangles. It was studied by sea captains for navigation, surveyor to map out the new lands, by engineers and others.
Currently, trigonometry is used in many areas such as the science of seismology, designing electric circuits, describing the state of an atom, predicting the heights of tides in the ocean, analyzing a musical tone and in many other areas. In earlier classes, we have studied the trigonometric ratios of acute angles as the ratio of the sides of a right angled triangle. We have also studied the trigonometric identities and application of trigonometric ratios in solving the problems related to heights and distances. In this Chapter, we will generalise the concept of trigonometric ratios to trigonometric functions and study their properties


Mathematician knows how to solve a problem, he can not solve it. – MILNE

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