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Learn how to find the value of cos 120 using two angles, 90 and 180 degrees, and their cosine functions. See the trigonometric table for other angles and their values, and test your knowledge with a quiz.
Learn how to find the value of cos 120 degrees using the unit circle, trigonometric functions, and identities. See examples of cos 120 degrees in different expressions and FAQs.
How to find the value of cos 120 °? Solution. Find the value of cos 120 °. We know that. cos α + β = cos α cos β - sin α sin β. Now by substituting the value of α = 90 ° and β = 30 ° in the trigonometric identity we get.
4 days ago · Cos 120 degree is equal to minus half which can be written as (- ½ ) or (-0.5). Cos is one of the functions of Trigonometry that deals with the relationship between the angles and sides of a right-angled triangle. So in short, we can say that measuring a triangle (specifically right-angled triangle) is trigonometry.
- 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...
Jan 24, 2023 · The value of cos 120° is -1/2 or -0.5 as it lies in the 2nd quadrant where cosine is negative. The formula of cosine is, cos x = (adjacent side) / (hypotenuse). Here, the adjacent side is adjacent to angle x, and the hypotenuse is the triangle’s longest side.
Jul 7, 2024 · Enter the angle in degrees or radians and get the cosine value instantly. Learn the cosine definition, graph, table, and properties, and see examples of how to use the cosine calculator.
Exact Form: −1 2 - 1 2. Decimal Form: −0.5 - 0.5. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.
