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1. byjus.com › maths › value-of-cos-120Value of Cos 120 degree and other trigonometric angles - BYJU'S

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   Learn how to find the value of cos 120 using trigonometric identities and angles. See the trigonometry table for other angles and their cosine values.

2. www.cuemath.com › trigonometry › cos-120-degreesCos 120 Degrees - Find Value of Cos 120 Degrees - Cuemath

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   The value of cos 120 degrees is -0.5. Cos 120 degrees in radians is written as cos (120° × π/180°), i.e., cos (2π/3) or cos (2.094395. . .). In this article, we will discuss the methods to find the value of cos 120 degrees with examples. Cos 120°:-0.5; Cos 120° in fraction:-(1/2) Cos (-120 degrees):-0.5

3. www.embibe.com › exams › cos-120Cos 120 Degree: How can you find the value of cos 120? - EMBIBE

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   Jan 24, 2023 · Learn how to find the value of cos 120 using trigonometric formulas and a right-angled triangle. See the trigonometrical table, identities and sample questions for cos 120.

   • You can use the formulas i) cos (180° - θ) = - cosθ or ii) cos (90° + θ) = - sinθ. To find the cos 120.
   • In radian, the value of cos 120 is 2π/3 i.e equal to -1/2.
   • The method to evaluate cosine 120 has been provided on this page.
   • Cos 15 equals -√3/2.
   • Ans. The value of Cos 90 is 0.

4. Videos

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     cos120 | cos(120)| cosine of 120 degree | First Method

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     cos120 | cos(120)| cosine of 120 degree | Third Method

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     Trigonometric Functions and the Unit Circle - Example (Cosine of 120 Degrees)

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5. testbook.com › maths › value-of-cos-120Value of Cos 120 in Degree & Radian with Solved Examples

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   May 4, 2023 · Learn how to find the value of cos 120 in degree and radian using unit circle, trigonometric identities and decimals. See the value of cos 120 in fractions, decimals and radians with examples and a chart.

6. www.vedantu.com › maths › value-of-cos-120Value of Cos 120 Degree and Other Trigonometric Angles - Vedantu

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   1 day ago · Learn how to find the value of cos 120 degree using trigonometry ratios, quadrant rules, and related angles. See diagrams, examples, and formulas for cos 120 degree and other angles.

   • The value of cos 120 is minus half which can be written as -1/2 or -0.5. there are two ways through which the value of cos 120 can be calculated, t...
   • The study notes on the topic value of course 120 are easily available on Vedantu’s website; these notes have been curated carefully by Vedantu’s te...
   • Vedantu’s article on cost 120° is mainly about the ways in which the value of course 120° can be calculated and it explains in-depth the various fu...
   • The four quadrants of a triangle are as follows-First Quadrant: All the angles between 0⁰ and 90⁰ lie in the first quadrant. The value of all the f...
   • The three basic functions of trigonometry are sin, cos, tan. These functions are explained in-depth in the study notes provided by Vedantu, which h...

7. www.omnicalculator.com › math › cosCosine Calculator

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   Jun 29, 2024 · Enter the angle in degrees or radians and get the cosine value instantly. Learn the cosine definition, graph, table, and properties, and how to use the law of cosines.

8. www.cuemath.com › questions › how-to-find-the-valueHow to find the value of cos 120 degree? - Cuemath

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   Learn how to find the value of cos 120 degree using trigonometry formulas. The answer is -1/2, which can be written as a fraction or a decimal.