Trigonometric Functions
This topic is a quick review for
readers who need a reminder about this area of mathematics. If you’re familiar
with trigonometry, you can skip this topic. If you find this topic difficult to
follow, you might consult a more basic reference on mathematics.
Trigonometric functions
are principally used to model or describe:- The relation between angles in a triangle (hence the name).
- Rotations about a circle, including locations given in polar coordinates.
- Cyclical or periodic values, such as sound waves.
The sine and cosine
functions yield the same values, but the phase differs along the X axis by /2:
in other words, 90 degrees.
The inverse functions for the trigonometric functions are the arc functions; the inverse only applies to values of x restricted by –/2 ≤ X ≤ /2. The graphs for these functions appear like the basic trigonometric function graphs, but turned on their sides.
The inverse functions for the trigonometric functions are the arc functions; the inverse only applies to values of x restricted by –/2 ≤ X ≤ /2. The graphs for these functions appear like the basic trigonometric function graphs, but turned on their sides.
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