What does atan2 mean in Excel?

arctangent
The Excel ATAN2 function returns the arctangent from x- and y-coordinates. In geometric terms, the function returns the radian angle corresponding to the input point. Get arctangent from x- and y-coordinates. The angle in radians of the point. =ATAN2 (x_num, y_num)

How is atan2 calculated?

The atan2 function calculates one unique arc tangent value from two variables y and x, where the signs of both arguments are used to determine the quadrant of the result, thereby selecting the desired branch of the arc tangent of y/x, e.g., atan2(1, 1) = π/4 and atan2(−1, −1) = −3π/4.

Is atan2 the same as tan 1?

Description. P = atan2( Y , X ) returns the four-quadrant inverse tangent (tan-1) of Y and X , which must be real. The atan2 function follows the convention that atan2(x,x) returns 0 when x is mathematically zero (either 0 or -0 ).

Can Excel do Arctan?

There are two functions for calculating the inverse tangent or arctan in Excel. These two functions are ATAN and ATAN2 (“atan” is short for arctangent), and they each have specific uses depending on the desired results that you’d like to obtain and the inputs available.

What is atan2 in math?

The Math. atan2() method returns a numeric value between -π and π representing the angle theta of an (x, y) point. This is the counterclockwise angle, measured in radians, between the positive X axis, and the point (x, y) . Because atan2() is a static method of Math , you always use it as Math.

How do I get Arctan degrees in Excel?

To express the arctangent in degrees, multiply the result by 180/PI( ) or use the DEGREES function.

What is the range of atan2?

Return Value The atan() function returns a value in the range -π/2 to π/2 radians. The atan2() function returns a value in the range -π to π radians.

Can atan2 be negative?

A positive result represents a counterclockwise angle from the x-axis; a negative result represents a clockwise angle. ATAN2(a,b) equals ATAN(b/a), except that a can equal 0 in ATAN2.

What is Mathf ATAN2?

Atan2(Single, Single) Method is used to return the angle whose tangent is the quotient of two specified numbers. Basically, it returns an angle θ (measured in radian) whose value lies between -π and π. This is a counterclockwise angle lies between the positive x-axis, and the point (x, y).

What is the range of ATAN2?

How do you convert sin to degrees in Excel?

The Excel SIN function returns the sine of angle given in radians. To supply an angle to SIN in degrees, multiply the angle by PI()/180 or use the RADIANS function to convert to radians.

When to use Atan and atan2 in Excel?

However, use the ATAN2 function if: You want to return angles in all four quadrants of the unit circle The ATAN function returns a result between -π/2 and π/2 radians (or -90 and 90 degrees), or in other words, in the first and fourth quadrants.

Why are the results of the Atan function negative in Excel?

As you can see, Excel has limited the results to the first and fourth quadrants. Why did this happen? Since there is only one argument to the ATAN function, Excel calculates the value of y/x before if evaluates the ATAN function. It cannot determine, then, whether the input to ATAN is negative because the x-value or the y-value is negative.

How is an angle measured in Excel atan2?

A circle of radius one demonstrates all possible return values for the function. For negative y-values the function returns a negative angle. An angle is measured from the positive x-axis direction with the positive direction in the counter-clockwise direction and the negative direction in the clockwise direction. Convert Output to Degrees

Is the function atan2 a function of two variables?

As the function atan2 is a function of two variables, it has two partial derivatives. At points where these derivatives exist, atan2 is, except for a constant, equal to arctan(y/x).