Table of Contents
Welcome to tan -291°, our post aboutthe tan minus 291 degrees.
For the tangent of -291 degrees we use the abbreviation tan for the trigonometric function together with the degree symbol °, and write it as tan -291°.
If you have been looking for what is tan -291°, or if you have been wondering about tan -291 degrees in radians, then you are right here, too.
In this post you can find the tan -291° value, along with identities.
Read on to learn all about the tan of -291°.
Tan Minus 291 Degrees
If you want to know what is tan -291 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 tan -291°:
tan -291° = 2.60509
tan -291 degrees = 2.60509
The tan of -291 degrees is 2.60509, the same as tan of -291 degrees in radians. To obtain -291 degrees in radian multiply -291° by $\pi$ / 180° = -97/60 $\pi$. Tan -291degrees = tan (-97/60 × $\pi)$.
Our results of tan-291° have been rounded to five decimal places. If you want tangent -291° with higher accuracy, then use the calculator below; our tool displays ten decimal places.
To calculate tan -291 degrees insert the angle -291 in the field labelled °, but if you want to calculate tan -291 in radians, then you have to press the swap unit button first.
Calculate tan [degrees]
The identities of tangent -291° are as follows:
= cot (90° + 291°) = cot 381°
-tan-291°
= tan 291° = -tan -291°
= cot (90° – 291°) = cot -201°
= tan (180° + 291°) = tan 471°
There are more formulas for the double angle (2 × -291°), half angle ((-291/2)°) as well as the sum, difference and products of two angles such as -291° and β.
You can locate all of them in the respective article found in the header menu. To find everything about tan 291° click the link. And here is all about cot -291°, including, for instance, a converter.
In terms of the other five trigonometric functions, tan of -291° =
- $\pm\frac{\sin (-291^\circ)}{\sqrt{1 – \sin^{2} (-291^\circ})}$
- $\pm\frac{\sqrt{1 – \cos^{2} (-291^\circ)}}{\cos (-291^\circ)}$
- $\pm \sqrt{\sec^{2} (-291^\circ) – 1}$
- $\pm\frac{1}{\sqrt{\csc^2 (-291^\circ) – 1}}$
- $\frac{1}{\cot (-291^\circ)}$
As the cotangent function is the reciprocal of the tangent function, 1 / cot -291° = tan-291°.
In the next part of this article we discuss the trigonometric significance of tan minus 291°, and there you can also learn what the search calculations form in the sidebar is used for.
What is tan -291°?
In a circle with the radius r, the horizontal axis x, and the vertical axis y, -291 degrees is the angle formed by the two sides x and r; r moving counterclockwise is the positive angle.
Applying the unit-circle definition found on our homepage, assumed r = 1, in the intersection of the point (x,y) and the circle, y = sin -291°, x = cos -291° and tan -291° = sin -291°/cos -291°.
Note that you can locate many terms including the tangent-291° value using the search form. On mobile devices you can find it by scrolling down. Enter, for instance, value of tan-291°.
Along the same lines, using the aforementioned form, can you look up terms such as tan -291° value, tan -291, tan-291° value and what is the tan of -291 degrees, just to name a few.
Given the periodicity of tangent of -291°, to determine the tangent of an angle < -180°, e.g. -1011°, calculate tan -1011° as tan (-1011 Mod 180)° = tangent of -291°, or look it up with our form.
Conclusion
The frequently asked questions in the context include what is tan -291 degrees and what is the tan of -291 degrees for example; reading our content they are no-brainers.
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– Article written by Mark, last updated on February 23rd, 2017