### TAN(number)

Returns the tangent of a number.

 number The number you want the tangent of.

#### Remarks

 * This function is periodic with a period of 2PI.* The "number" is the angle in radians.* If "number" is not numeric, then #VALUE! is returned. Example 14.* If your argument is in degrees, multiply it by PI/180 to convert it to radians.* If you want the result to be in degrees, multiply the result by 180/PI.* You can use the ATAN function to return the arc-tangent. Example 15.* You can use the COS function to return the cosine.* You can use the SIN function to return the sine.* 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 =TAN(0) = 0.000 2 =TAN(0.5) = 0.546 3 =TAN(1) = 1.557 4 =TAN(PI()/2) = 1.632E+16 5 =TAN(2.5) = -0.747 6 =TAN(PI()) = 0.000 7 =TAN(-0.5) = -0.546 8 =TAN(-1) = -1.557 9 =TAN(-PI()/2) = -1.632E+16 10 =TAN(-2.5) = 0.747 11 =TAN(-PI()) = 0.000 12 =TAN(60*PI()/180) = 1.732 13 =TAN(-50) = 0.272 14 =TAN(-1) = -1.557 15 =TAN(ATAN(0.5)) = 0.5 16 =TAN("some text") = #VALUE!