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en.wikipedia.org/wiki/Trigonometry

Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships between side lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies.

answers.yahoo.com/question/index?qid=20110612165057AAqAoeg

For instance, how do I find K if my period is 5pi/6 ... How can I find K if I know the period: Trigonometry graph? I know how to find the period if I already know K. I cannot, for the life of me, go backwards from that. How do I find K if all I know is the period? For instance, how do I find K if my period is 5pi/6

www.mathsisfun.com/algebra/trigonometry.html

Trigonometry helps us find angles and distances, and is used a lot in science, engineering, video games, and more! Right-Angled Triangle. The triangle of most interest is the right-angled triangle.The right angle is shown by the little box in the corner:

en.wikipedia.org/wiki/Trigonometric_functions

The most familiar trigonometric functions are the sine, the cosine, and the tangent. Their reciprocal are respectively the cosecant, the secant, and the cotangent, which are less used in modern mathematics. The oldest definitions of trigonometric functions, related to right-angle triangles, define them only for acute angles.

www.khanacademy.org/math/trigonometry/trigonometry-right...

Learn the basics of trigonometry: What are sine, cosine, and tangent? How can we use them to solve for unknown sides and angles in right triangles? Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free ...

owlcation.com/stem/What-is-Trigonometry

What is Trigonometry: Trigonometry is the branch of mathematics devoted explicitly to the relationship between the sides and angles of triangles. Its name even sounds triangle-y and for a good reason: the word trigonometry is derived from two Greek words - 'trigonon' which means 'triangle' and 'metron' meaning 'measure.'

study.com/academy/lesson/what-is-trigonometry-functions...

What Is Trigonometry? Trigonometry can be defined as the calculation part of geometry. Trigonometry is where you apply your knowledge of triangles from geometry and use the resulting formulas to ...

www.dictionary.com/browse/trigonometry

Trigonometry definition, the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the calculations based on them. See more.

www.livescience.com/51026-what-is-trigonometry.html

Trigonometry is a branch of mathematics that studies relationships between the sides and angles of triangles. Trigonometry is found all throughout geometry, as every straight-sided shape may be ...

www.mjburns.net/MCR3UW/MCR Unit 6.6.pdf

g x kx cos , or h k tan . Where the constant k aids us in determining the period for the function. The Period (wavelength) of sin(kt) and cos(kt) If k>0, then the graph of f t kt sin or f t kt cos makes k complete cycles between 0 and 2 , and each functions has a period of: Period= 2 k