TRIGONOMETRY

I CONGRAJULATE YOU ON:- NATIONAL MATHS DAY

INTORDUCTION

TRIGONOMETRY IS A BRANCH OF MATHEMATICS WHICH DEALS WITH

TRIANGLES PARTICULARLY RIGHT TRIANGLES

THERE ARE BEHIND HOW SOUND AND LIGHT MOVE AND ARE ALSO

INVOLVED IN OUR PERCEPTIONS OF BEAUTY OF AND OTHER FACETS ON HOW OUR

MIND WORKS

SO TRIGONOMETRY TURNS OUT TO BE FUNDAMENTAL TO PRETTY

MUCH EVERY THING

A TRIGONOMETRIC FUNCTION IS ARATIO OF CERTAIN PARTS OF TRIANGLE

THEY ARE => SIN, COS , TAN , COS , SEC , COT.

HAVE A LOOK AT THEM :-

VALUES OFTRIGONOMETRIC RATIOS

USES OF TRIGONOMETRY

ONE OF THE MOST ANCIENT SUBJECTS STUDIED BY SCHOLARS ALL OVER THE WORLD,ASTRONOMERSHAVE USED TRIGONOMETRY TO CALCULATE THE DISTANCE FROM EARTH TO SUN ETC.,IT IS ALSO USED INGEOGRAPHY,

THE KNOWLEDGE OF TRIGONOMETRY IS USED IN CONSTRUCTION OF MAPS ETC.,,

BASIC FUNDAMENTALS :-

ANGLE OF ELEVATIONIN THE BELOW PIC , AN OBSERVER IS STANDING AT TOP OF BUILDING AND IS LOOKING STRAIGHT TO A PLANE.IF WE DRAW A HORIZONTAL WE GET ANGLE OF ELEVATION

ANGLE OF DEPRESSION:-

THE ANGLE WHEN A PERSON WATCHES FROM THE TOF BUILDING ,PLANE ETC TO THE GROUND IS KNOWN AS

ANGLE OF DEPRESSION