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Learn how to find and remember the trig ratios of special angles using video lessons, examples, solutions and worksheets. See how to use the trig ratios to evaluate expressions and functions involving sine, cosine and tangent of 0, 30, 45, 60 and 90 degrees.
Learn how to evaluate the trigonometric functions of 30o, 45o, and 60o angles using special right triangles. See the formulas, diagrams, and examples for each angle and function.
Learn how to use pictures, tables, and fingers to memorize the trigonometric values of 30-60-90 and 45-45-90 triangles. These angles are useful for solving right triangles and finding exact solutions in calculus.
Learn how to evaluate trigonometric ratios of 0, 30, 45, 60 and 90 degrees using right triangles and formulas. Watch video lessons, see examples and solutions, and practice with interactive calculator.
Learn how to use geometry to find the trigonometric ratios of angles 0°, 30°, 45°, 60° and 90°. See examples, definitions and a table of values for these special angles.
Learn the definitions and values of sine, cosine and tangent for special angles such as 0°, 30°, 45°, 60°, 90°, 180° and 270°. See how to derive and apply these values using geometric constructions and formulas.
In this article, we will explore the trigonometric ratios for special angles: \(0^\circ\), \(30^\circ\), \(45^\circ\), \(60^\circ\) and \(90^\circ\) as well as introduce \(\text{Cosec}\), \(\text{Sec}\) and \(\text{Cot ratios}\). Watch our video lesson!