A, tan function syntax
function function: Returns the tangent value of the given angle.
Number is the angle of the tangent, expressed in radians.
Note: If the unit of the parameter is degrees, you can multiply it by PI ()/180 or use the RADIANS function to convert it to radians.
Examples of tan functions
When ①number is the angle
If the number is 45 o'clock, if the direct use of the formula =tan (45) results are: 1.61978
Obviously, not the correct tangent, we should convert the angle of 45 to radians so that we can get the correct result, the following is the correct formula:
=tan (RADIANS (45))
Results return 1
Formula Explanation: The function of the radians function is to convert the angle to radians; If you want to learn how to convert between angles and radians, see the article: http://www.dzwebs.net/3145.html
When ②number is radians
In this case, you can use the formula directly.
When number is 0.785398163397448, the result of the formula =tan (0.785398163397448) returns 1
If the argument is in degrees, you can multiply it by PI ()/180 or use the RADIANS function to convert it to radians.