Trigonometry
brochure
Canayel Agdan
9-Helium
TRIGONOMETRY
Trigonometry comes from
the ancient greek word:
Trigon, meaning :triangle,
and Metron, meaning:
Measure. So
Trigonometry is the study
involving triangles.There
are three sides of a rightangled triangle with
respect to any of its acute
angles are known as the
trigonometric ratios of
that particular angle. The
three sides of the right
triangle are: Hypotenuse
which is the longest side,
adjacent which is the side
next to the angle opposite
which is the opposite side
to the angle
THERE ARE 3 BASIC
TRIGOMETRIC RATIO WICH IS
THE SINE 0
=OPPOSITE/HYPOTENUSE/SO
H, COSINE 0=
ADJACENT/HYPOTENUSE/CA
H, AND TANGENT 0=
OPPOSITE/ADJACENT /TOA
THERE ARE 3 OTHER
TRIGONOMIC RATIO CALLED
THE RECIPROCAL
TRIGONOMETRIC RATIO
WHICH IS, COSECANT 0=
HYPOTENUSE/OPPOSITE/CH
A, SECANT 0=
HYPOTENUSE/ADJACENT/SH
A, AND COTANJENT=
ADJACENT/OPPOSITE/CAO
TIGONOMETRIC
RATIOS OF
SPECIAL
ANGLES
in trigonometry 30°, 45°, 60°
are called as special angles and
they always lie in the first
quadrant. This is the table of
the trigonometric ratios of
special angles.
Computing the
numerical value of
trigonometric
ratios using
ANGLE OF
ELEVVATION AND
ANGLE OF
DEPRESSION
special angles
Example:
ANGLE OF ELEVATION
The angle of elevation is an angle that is
formed between the horizontal line and
the line of sight basically the angle of
elevation is the line above the line of sight
ANGLE OF DEPRESSION
The angle of depression is the the angle of
depression is the angle between the
horizontal line basically it is the angle of
depression is the line below the liine of
sight