
What is ?
Answer
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Hint: Sometimes or is also written in the form . So, is the compositional inverse of the trigonometric function tangent and it gives an answer in the form of an angle. It is basically used to find an angle from the trigonometric ratios.
Formula used: The formulas used are:
If
Derivative of :
Complete step by step solution:
is another form of the inverse of tangent function. It is also written in the form or . Now let us see some of its properties.
Addition of two tangent inverse functions:
If and are two angles, then,
Derivative of :
can also be obtained by integrating the derivative within the limits to .
The graph of inverse tangent function:
Other inverse tangent properties:
Domain of the ratio is all real numbers
Range of value in radians is < <
Range of value in degrees is < <
The tangent inverse of infinity is:
Note: If we want to calculate an angle in a right angled triangle, then the inverse tangent function can be used for this. i.e. in a right angled triangle ABC
Angle, can be calculated as:
Where, is on the opposite side and is on the adjacent side.
It is to be noted that should not be confused with because is the inverse of the tangent function while is the cotangent i.e.
As the tan inverse or gives the value in the form of an angle, so, the numbers between which the value of lies i.e. the range of is also calculated in degrees or radians.
Formula used: The formulas used are:
If
Derivative of
Complete step by step solution:
Addition of two tangent inverse functions:
If
Derivative of
The graph of inverse tangent function:

Other inverse tangent properties:
Domain of the ratio is all real numbers
Range of value in radians is
Range of value in degrees is
The tangent inverse of infinity is:
Note: If we want to calculate an angle in a right angled triangle, then the inverse tangent function can be used for this. i.e. in a right angled triangle ABC

Angle,
Where,
It is to be noted that
As the tan inverse or
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