Learn how to use the Pythagoras Theorem and other identities to simplify and calculate trigonometric functions such as sine, cosine and tangent. See examples, diagrams and formulas for right triangles, cosecants, secants, cotangents and more.
Trigonometric functions and their reciprocals on the unit circle. All of the right-angled triangles are similar, i.e. the ratios between their corresponding sides are the same. For sin, cos and tan the unit-length radius forms the hypotenuse of the triangle that defines them.
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Learn how to use sin, cos, and tan to find the missing sides or angles of a right-angled triangle using formulas, values, and tables. Explore the acronym "SOHCAHTOA", the unit circle, and the applications of sin cos tan in real life.
Learn how to calculate sine, cosine and tangent of any angle using the formula soh s ine = o pposite / h ypotenuse, soh cah c os = a djacent / h ypotenuse, soh toa t an = o pposite / a djacent. See examples, practice questions and a memory trick for sohcahtoa. Trigonometry Ratios-Sine, Cosine, Tangent. The trigonometric ratios of a triangle are also called the trigonometric functions. Sine, cosine, and tangent are 3 important trigonometric functions and are abbreviated as sin, cos and tan. Let us see how are these ratios or functions, evaluated in case of a right-angled triangle.Learn the formulas and graphs of sin, cos and tan, the three basic trigonometric functions, with examples and videos. Find out how to use the sine, cosine and tangent rules and the Pythagoras identity to solve problems involving right-angled triangles.
We know that sin, cos, and tan are the reciprocals of cosec (or csc), sec, and cot functions. Thus, we can derive 3 more formulas related to sin, cos, and tan. sin A = 1/csc A (or) csc A = 1/ sin A. cos A = 1/sec A (or) sec A = 1/cos A. tan A = 1/cot A (or) cot A = 1/tan A.
Learn how to calculate sine, cosine and tangent of any angle using a right-angled triangle. See examples, formulas, graphs and exercises to practice the functions. Find out the difference between sine, cosine and tangent, and the other functions such as secant, cosecant and cotangent.
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