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Welcome to cos -2pi, our post aboutthe cosine of -2pi.
For the cos minus 2pi we use the abbreviation cos for the trigonometric function and write it as cos -2pi.
If you have been looking for what is cos -2pi, or if you have been wondering about cos -2pi radians in degrees, then you are right here, too.
In this post you can find the cos -2pi value, along with identities.
Read on to learn all about the cos of -2pi.
Cos Minus 2Pi Radians
If you want to know what is cos -2pi radians in terms of trigonometry, then navigate straight to the explanations in the next paragraph; what’s ahead in this section is the value of cos -2pi:
cos -2pi = 1
cos -2pi radians = 1
The cos of -2pi radians is 1, the same as cos of -2pi radians in degrees. To change -2pi radians to degrees multiply -2pi by by 180° / $\pi$ = -360°. Cos -2pi = cos -360 degrees.
Our results of cos-2pi have been rounded to five decimal places. If you want cosine -2pi with higher accuracy, then use the calculator below; our tool displays ten decimal places.
To calculate cos -2pi radians insert the angle -2pi in decimal notation, but if you want to calculate cos -2pi in degrees, then you have to press the swap unit button first.
Calculate cos [radians]
The identities of cosine -2pi are as follows:
= sin (pi/2 – 2pi) = sin -3/2 pi
= sin (pi/2 + 2pi) = sin 5/2 pi
-cos-2pi
= cos (pi – 2pi) = cos -pi
= cos (pi + 2pi) = cos 3 pi
There are more formulas for the double angle (2 × -2pi), half angle ((-2pi/2)) as well as the sum, difference and products of two angles such as -2pi and β.
You can locate all of them in the respective article found in the header menu. To find everything about cos 2pi click the link. And here is all about sin -2pi, including, for instance, a converter.
In terms of the other five trigonometric functions, cos of -2pi =
- $\pm \sqrt{1-\sin^{2} (-2\pi) }$
- $\pm\frac{1}{\sqrt{1 + \tan^{2} (-2\pi)}}$
- $\pm\frac{\cot (-2\pi)}{\sqrt{1 + \cot^{2} (-2\pi)}}$
- $\frac{1}{\sec (-2\pi)}$
- $\pm\frac{\sqrt{\csc^{2} (-2\pi) – 1} }{\csc (-2\pi)}$
As the cosine function is the reciprocal of the secant function, 1 / sec -2pi = cos-2pi.
In the next part we discuss the trigonometric significance of cos minus 2pi, and there you can also learn what the search calculations form in the sidebar is used for.
What is cos -2Pi?
In a circle with the radius r, the horizontal axis x, and the vertical axis y, -2pi is the angle formed by the two sides x and r; r moving counterclockwise is the positive angle.
As detailed in the unit-circle definition on our homepage, assumed r = 1, in the intersection of the point (x,y) and the circle, x = cos -2pi.
Note that you can locate many terms including the cosine-2pi value using the search form. On mobile devices you can find it by scrolling down. Enter, for instance, value of cos-2pi.
Along the same lines, using the aforementioned form, can you look up terms such as cos -2pi value, cos -2pi, cos-2pi value and what is the cos of -2pi radians, just to name a few.
Given the periodic property of cosine of -2pi, to determine the cosine of an angle < -2pi, e.g. -6 pi, calculate cos -6 pi as cos (-6 pi mod 2pi) = cosine of -2pi, or look it up with our form.
Conclusion
The frequently asked questions in the context include what is cos -2pi radians and what is the cos of -2pi degrees for example; reading our content they are no-brainers.
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– Article written by Mark, last updated on February 26th, 2017