Cos of 2pi/3

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Cos of 2pi/3

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What kind of answers are those?

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We must now determine the reference angle for degrees. Since degrees is in quadrant II, the reference angle is found by using the expression - theta , where theta is the angle in degrees. Calculating we get a reference angle of 60 degrees. We must now apply our knowledge of the special triangles to continue. The special triangle that contains 60 degrees is the degrees, that has side lengths of 1, sqrt 3 and 2 , respectively. So, the hypotenuse measures 2, the side opposite our angle measures sqrt 3 and the side adjacent measures 1. For example, we can say with this acronym that cos is positive in quadrant IV. Feel free to ask anything more either on my Socratic dashboard or on the main questions page. I understand that this might at first seem like a long and complicated process.

Cos of 2pi/3

Cos 2pi gives the value of the cosine function when the angle made with the positive x-axis is 2pi, that is, one complete rotation. The value of cos 2pi is one such value and can be found using different methods. In this article, we will determine the value of cos 2pi as 1 using various methods along with some examples. So, the value of cos 2pi is equal to the value of cos 0 which is 1. So, cos 2pi is equal to 1. Now, we will use some of these values to determine the value of cos 2pi using different methods such as graphically, standard angles, unit circle, and double angle formula.

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Can somebody help me? Use what you learned back in trig. I manage to do it right, but I would not be able to find how many terms, considering the general taylor series formula. First, I tried to find the error code below. Joined Oct 19, Messages 1. Answers 1. See Also. Is there actually some special triangle or something that could be used to solve that? Click to expand Toggle Main Navigation. Thiago Augusto Borges Rodrigues on 12 Jan What kind of answers are those? Log in Register. Sign in to answer this question. Log in.

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Is there actually some special triangle or something that could be used to solve that? What kind of answers are those? Select the China site in Chinese or English for best site performance. Thiago Augusto Borges Rodrigues on 9 Jan Is there actually some special triangle or something that could be used to solve that? What are your basic reference angles? What does the cosine wave look like? You should upgrade or use an alternative browser. Can you show us what you have done so far and descirbe the problems you seem to be having and why things don't look right to you? Joined Feb 4, Messages 16,