COS(number)

Returns the cosine of a number.

numberThe number you want the cosine of.

Remarks

* This function is periodic with a period of 2PI.
* The "number" is the angle in radians.
* If "number" is not numeric, the #VALUE! is returned. Example 15.
* If your argument is in degrees, multiply it by PI/180 to convert it to radians.
* If your argument is in radians, multiply it by 180/PI to convert it to degrees.
* You can use the ACOS function to return the arc-cosine. Example 14.
* You can use the SIN function to return the sine.
* You can use the TAN function to return the tangent.
* You can use the DEGREES function to convert from radians to degrees.
* For a working example refer to the Quant > Trigonometric Functions page.
* For the Microsoft documentation refer to support.office.com

 A
1=COS(0) = 1.000
2=COS(0.5) = 0.878
3=COS(1) = 0.540
4=COS(PI()/2) = 0.000
5=COS(2.5) = -0.801
6=COS(PI()) = -1.000
7=COS(-0.5) = 0.878
8=COS(-1) = 0.540
9=COS(-PI()/2) = 0.000
10=COS(-2.5) = -0.801
11=COS(-PI()) = -1.000
12=COS(45*PI()/180) = 0.707
13=COS(60*PI()/180) = 0.500
14=COS(90*PI()/180) = 0.000
15=COS(120*PI()/180) = -0.500
16=COS(180*PI()/180) = -1.000
17=COS(360*PI()/180) = 1.000
18=COS(ACOS(0.017)) = 0.017
19=COS("some text") = #VALUE!

1 - What is the cosine of 0 radians.
2 - What is the cosine of 0.5 radians.
3 - What is the cosine if 1 radian.
4 - What is the cosine of (PI/2) radians.
5 - What is the cosine of 2.5 radians.
6 - What is the cosine of PI radians.
7 - What is the cosine of -0.5 radians.
8 - What is the cosine of -1 radian.
9 - What is the cosine of (-PI/2) radians.
10 - What is the cosine of -2.5 radians.
11 - What is the cosine of -PI radians.
12 - What is the cosine of 45 degrees.
13 - What is the cosine of 60 degrees.
14 - What is the cosine of 90 degrees.
15 - What is the cosine of 120 degrees.
16 - What is the cosine of 180 degrees.
17 - What is the cosine of 360 degrees.

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