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Learn how to calculate sine, cosine and tangent of any angle using a right triangle. See examples, graphs, exercises and mnemonics for these trigonometric functions.
cos θ = Adjacent/Hypotenuse. tan θ = Opposite/Adjacent. In trigonometry, sin, cos, and tan are the basic trigonometric ratios used to study the relationship between the angles and sides of a triangle (especially of a right-angled triangle). Understand the sin, cos, tan values using examples.
This page explains the sine, cosine, tangent ratio, gives on an overview of their range of values and provides practice problems on identifying the sides that are opposite and adjacent to a given angle. The Sine, Cosine and Tangent functions express the ratios of sides of a right triangle.
Learn how to use sin cos tan to find missing sides or angles of right-angled triangles. See examples, worksheets and SOHCAHTOA mnemonic.
Learn the basics of trigonometry, such as sine, cosine and tangent, and how to use them to find angles and distances in right-angled triangles. See examples of how to calculate and plot these functions using a calculator, a unit circle and a protractor.
Learn how to use trigonometric identities to simplify expressions involving sine, cosine and tangent functions. See examples of right triangle, double angle, half angle, sum and difference identities.
Here you will learn about sin cos tan (sine, cosine, tangent), including understanding what these three trigonometric functions are and their ratios, when to use these functions, their inverses, and how to use them.
