Trigonometric Functions |
|
|
|
| |
|
|
|
| ||
Trigonometric functions determine the ratio of three sides | a | ||||
of a right triangle. C ombination of three sides are sin, cos, |
| ||||
|
|
| b | ||
and tan.Their relations are; |
|
|
|
| |
|
|
| θ |
|
|
|
|
|
| ||
|
|
|
|
| |
C alculates the sine of an angle. | sinθ = | b | c | ||
|
|
| |||
a |
|
|
| ||
|
|
|
|
| |
C alculates the cosine of an angle. | cosθ = | c |
|
|
|
a |
|
|
| ||
C alculates the tangent of an angle. tanθ = bc
<Example>
The angle from a point 15 meters from a building to the highest floor of the building is 45°. How tall is the building?
[DEG mode]
O per ation
45 
15
1 
5
View point
D isplay
DEG
A P P L IC AT IO N S:
Trigonometric functions are useful in mathematics and various engineering calculations.They are often used in astronomical observations, civil engi- neering and in calculations involving electrical circuits, as well as in calcula- tions for physics such as parabolic motion and wave motion.
21