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.
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 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.
\(\sin{x} = \frac{o}{h}\), \(\cos{x} = \frac{a}{h}\) and \(\tan{x} = \frac{o}{a}\) Or: \(s^o_h~c^a_h~t^o_a\). Accurate trigonometric ratios for 0°, 30°, 45°, 60° and 90°
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.
Learn how to find sin cos tan values for any angle using formulas, table and examples. Find out the trigonometric ratios of sine, cosine, tangent, cotangent, secant and cosecant for different angles. See how to use the formulas and the chart to solve problems involving sin cos tan values. Learn the sine, cosine and tangent ratios of sides of a right triangle and how to identify the opposite, adjacent and hypotenuse sides using SOHCAHTOA. See examples, practice problems and a video lesson on the sine ratio. Sine, cosine and tangent are the primary trigonometry functions whereas cotangent, secant and cosecant are the other three functions. The trigonometric identities are based on all the six trig functions. Check Trigonometry Formulas to get formulas related to trigonometry. Table of Contents: Definition List of Trig Functions Reciprocal Identities .
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    • sin cos tan rules