The Law of Sines. The Law of Cosines. The Three Angles Add to 180°. Exterior Angle Theorem. Solving AAA Triangles. Solving AAS Triangles. Solving ASA Triangles. Solving SAS Triangles. Solving SSA Triangles. Solving SSS Triangles. Triangle Solving Practice. Introduction to the trigonometric ratios. Trigonometric ratios in right triangles. Learn how to find the sine, cosine, and tangent of angles in right triangles. The ratios of the sides of a right triangle are called trigonometric ratios. Three common trigonometric ratios are the sine (sin), cosine (cos), and tangent (tan). As we know, tan is the ratio of sin and cos, such as tan θ = sin θ/cos θ. Thus, we can get the values of tan ratio for the specific angles. Sin Values. sin 0° = √(0/4) = 0. sin 30° = √(1/4) = ½. sin 45° = √(2/4) = 1/√2. sin 60° = √3/4 = √3/2. sin 90° = √(4/4) = 1. Cos Values. cos 0° = √(4/4) = 1. cos 30° = √(3/4 Laws and theorems. Sines. Cosines. Tangents. Cotangents. Pythagorean theorem. Calculus. Trigonometric substitution. Integrals ( inverse functions) Derivatives. v. t. e. In mathematics, sine and cosine are trigonometric functions of an angle. For right-angled triangles, the ratio between any two sides is always the same and is given as the trigonometry ratios, cos, sin, and tan. Trigonometry can also help find some missing triangular information, e.g., the sine rule. 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. fhxcfT.

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