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Cos -687°

Welcome to cos -687°, our post aboutthe cosine of -687 degrees.

For the cos minus 687 degrees we use the abbreviation cos for the trigonometric function together with the degree symbol °, and write it as cos -687°.

If you have been looking for what is cos -687°, or if you have been wondering about cos -687 degrees in radians, then you are right here, too.

In this post you can find the cos -687° value, along with identities.

Read on to learn all about the cos of -687°.

Cos Minus 687 Degrees

If you want to know what is cos -687 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 -687°:

cos-687° = 0.83867
cos -687° = 0.83867
cos -687 degrees = 0.83867

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The cos of -687 degrees is 0.83867, the same as cos of -687 degrees in radians. To obtain -687 degrees in radian multiply -687° by $\pi$ / 180° = -229/60 $\pi$. Cos -687degrees = cos (-229/60 × $\pi)$.

Our results of cos-687° have been rounded to five decimal places. If you want cosine -687° with higher accuracy, then use the calculator below; our tool displays ten decimal places.

To calculate cos -687 degrees insert the angle -687 in the field labelled °, but if you want to calculate cos -687 in radians, then you have to press the swap unit button first.

Calculate cos [degrees]

A Really Cool Cosine Calculator and Useful Information! Please ReTweet. Click To TweetBesides cos-687°, similar trigonometric calculations on our site include, but are not limited, to:

The identities of cosine -687° are as follows:

cos-687°
= sin (90° – 687°) = sin -597°
= sin (90° + 687°) = sin 777°

-cos-687°
= cos (180° – 687°) = cos -507°
= cos (180° + 687°) = cos 867°

Note that cos-687° is periodic: cos (-687° + n × 360°) = cos -687 degrees, n$\hspace{5px} \in \hspace{5px} \mathbb{Z}$.

There are more formulas for the double angle (2 × -687°), half angle ((-687/2)°) as well as the sum, difference and products of two angles such as -687° and β.

You can locate all of them in the respective article found in the header menu. To find everything about cos 687° click the link. And here is all about sin -687°, including, for instance, a converter.

In terms of the other five trigonometric functions, cos of -687° =

  • $\pm \sqrt{1-\sin^{2} (-687 ^\circ)}$
  • $\pm\frac{1}{\sqrt{1 + \tan^{2} (-687^\circ)}}$
  • $\pm\frac{\cot (-687^\circ)}{\sqrt{1 + \cot^{2} (-687^\circ)}}$
  • $\frac{1}{\sec (-687^\circ)}$
  • $\pm\frac{\sqrt{\csc^{2} (-687^\circ) – 1} }{\csc (-687^\circ)}$

As the cosine function is the reciprocal of the secant function, 1 / sec -687° = cos-687°.

In the next part we discuss the trigonometric significance of cos minus 687°, and there you can also learn what the search calculations form in the sidebar is used for.

What is cos -687°?

In a circle with the radius r, the horizontal axis x, and the vertical axis y, -687 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 -687°.

Note that you can locate many terms including the cosine-687° value using the search form. On mobile devices you can find it by scrolling down. Enter, for instance, value of cos-687°.

Along the same lines, using the aforementioned form, can you look up terms such as cos -687° value, cos -687, cos-687° value and what is the cos of -687 degrees, just to name a few.

Given the periodic property of cosine of -687°, to determine the cosine of an angle < -360°, e.g. -1407°, calculate cos -1407° as cos (-1407 Mod 360)° = cosine of -687°, or look it up with our form.

Conclusion

Cos -687°The frequently asked questions in the context include what is cos -687 degrees and what is the cos of -687 degrees for example; reading our content they are no-brainers.

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Thanks for visiting cos minus 687 degrees.

– Article written by Mark, last updated on February 23rd, 2017

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