Table of Contents
Welcome to cos 369°, our post aboutthe cosine of 369 degrees.
For the cosine of 369 degrees we use the abbreviation cos for the trigonometric function together with the degree symbol °, and write it as cos 369°.
If you have been looking for what is cos 369°, or if you have been wondering about cos 369 degrees in radians, then you are right here, too.
In this post you can find the cos 369° value, along with identities.
Read on to learn all about the cos of 369°.
Cos 369 Degrees
If you want to know what is cos 369 degrees 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 369°:
cos 369° = 0.98769
cos 369 degrees = 0.98769
The cos of 369 degrees is 0.98769, the same as cos of 369 degrees in radians. To obtain 369 degrees in radian multiply 369° by $\pi$ / 180° = 41/20 $\pi$. Cos 369degrees = cos (41/20 × $\pi)$.
Our results of cos369° have been rounded to five decimal places. If you want cosine 369° with higher accuracy, then use the calculator below; our tool displays ten decimal places.
To calculate cos 369 degrees insert the angle 369 in the field labelled °, but if you want to calculate cos 369 in radians, then you have to press the swap unit button first.
Calculate cos [degrees]
The identities of cosine 369° are as follows:
= sin (90°+369°) = sin 459°
= sin (90°-369°) = sin -279°
-cos369°
= cos (180°+369°) = cos 549°
= cos (180°-369°) = cos -189°
There are more formulas for the double angle (2 × 369°), half angle ((369/2)°) as well as the sum, difference and products of two angles such as 369° and β.
You can locate all of them in the respective article found in the header menu. To find everything about cos -369° click the link. And here is all about sin 369°, including, for instance, a converter.
In terms of the other five trigonometric functions, cos of 369° =
- $\pm \sqrt{1-\sin^{2} 369 ^\circ}$
- $\pm\frac{1}{\sqrt{1 + \tan^{2} 369^\circ}}$
- $\pm\frac{\cot 369^\circ}{\sqrt{1 + \cot^{2} 369^\circ}}$
- $\frac{1}{\sec 369^\circ}$
- $\pm\frac{\sqrt{\csc^{2} 369^\circ – 1} }{\csc 369^\circ}$
As the cosine function is the reciprocal of the secant function, 1 / sec 369° = cos369°.
In the next part we discuss the trigonometric significance of cos369°, and there you can also learn what the search calculations form in the sidebar is used for.
What is cos 369°?
In a circle with the radius r, the horizontal axis x, and the vertical axis y, 369 degrees 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 369°.
Note that you can locate many terms including the cosine369° value using the search form. On mobile devices you can find it by scrolling down. Enter, for instance, value of cos369°.
Along the same lines, using the aforementioned form, can you look up terms such as cos 369° value, cos 369, cos369° value and what is the cos of 369 degrees, just to name a few.
Given the periodic property of cosine of 369°, to determine the cosine of an angle > 360°, e.g. 1089°, calculate cos 1089° as cos (1089 Mod 360)° = cosine of 369°, or look it up with our form.
Conclusion
The frequently asked questions in the context include what is cos 369 degrees and what is the cos of 369 degrees for example; reading our content they are no-brainers.
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– Article written by Mark, last updated on February 17th, 2017