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trignometry intruduction
1.
2. INTRODUCTION
Ex :
Suppose the student of a school aew
visting Qutub Minar. Now,if a student is
looking at the top of the Qutub Minar , a right
triangle can b imagined to ba made , as
shown in fig .Can the student find out the
height of the minar , without actually
measuring it.
3. TRIGNOMETRY
In all the situations given above , the distances
or heights can be found by using some
mathematical techniques which come under a
branch of mathematics called TRIGNOMETRY
. The word trignometry is derived from the
greek word “tri” means three , “ gon ” means
sides and metron means measure . In fact
trignometry is the study of relationships
between the sides and angles of a triangle.
4. HISTORY
The earliest known work on Trignometry was
recorded by Egypt and Babylon . Early
astronomers used it to find out distances of the
stars and planets from the earth. Even today,
most of the technologically advanced methods
used in engineering and physical Sciences are
based on Trignometrical concepts.
In this chapter will we study some ratios of the
sides of a right angled triangle with respect to
its acute angles ,called trignometric ratios of
the angle.
