Trigonometric Functions |
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Trigonometric functions determine the ratio of three sides | a | |||||
of a right triangle. The combinations of the three sides are | ||||||
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sin, cos, and tan. Their relations are: |
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C alculates the sine of an angle. | sinθ = | b | c | |||
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a |
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C alculates the cosine of an angle. | cosθ = | c |
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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.
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