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Trigonometric calculations are influenced by the selected angle unit. The angle unit indicator is displayed at the top of the calculator.

Supported Units:

Deg (Degrees) - The most commonly used unit of angular measure. A full circle is expressed as 360 degrees.
Rad (Radians) - Angles are based on the circumference of a circle. A full circle measures 2π radians.
Grad (Gradians) - An angular measure used mainly in Europe, particularly in France. An angle of 90 degrees is equivalent to 100 grads.

PI Constant
Represents the ratio of a circle's circumference to its diameter.
R = ➜ 3.14159...

Changing the angular mode
Pressing on the DRG button cycles through the angular units (Deg → Rad → Grad), and displaying the selected unit's indicator.
Note: Changing the angular mode can affect the results of trigonometric expressions.

DMS format: Degrees, Minutes, Seconds
You can enter angles directly in DMS format. Pressing the Կ button switches between units and adds the appropriate symbols (°, ', ") to the expression. You can set the format of the result to DMS by the S⇌D button.
Examples:
40°20'50" = 40.34722...
40°50" = 40.01388...

Press the ȷ button to open the 'Convert Angle' popup dialog. This dialog contains functions for performing angle conversions directly within an expression.

Operation	Action
Degrees	Inserting ^drg after a number or expression converts it from degrees to the current angular mode defined in the calculator.
Radians	Inserting ^rad after a number or expression converts it from radians to the current angular mode defined in the calculator.
Gradians	Inserting ^grd after a number or expression converts it from gradians to the current angular mode defined in the calculator.
À	This function converts a number or expression from degrees to radians
Á	This function converts a number or expression from degrees to gradians
Â	This function converts a number or expression from radians to degrees
Ã	This function converts a number or expression from radians to gradians
Ä	This function converts a number or expression from gradians to degrees
Å	This function converts a number or expression from gradians to radians

Examples:

In DEG mode: π^rad is evaluated as 180
In RAD mode: 180^deg is evaluated as 3.14 (π)
In any mode: À(90) is evaluated as 1.57

Pythagorean formula: hyp² = adj² + opp²

sin	Sine - Calculates the sine of an angle sin(θ) = opp / hyp
cos	Cosine - Calculates the cosine of an angle cos(θ) = adj / hyp
tan	Tangent - Calculates the tangent of an angle tan(θ) = opp / adj

v	Arc Sine - Calculates the inverse sine function. sin y = x → sin^-1 x = y θ = sin^-1(opp / hyp)
w	Arc Cosine - Calculates the inverse cosine function cos y = x → cos^-1 x = y θ = cos^-1(adj / hyp)
x	Arc Tangent - Calculates the inverse tangent function tan y = x → tan^-1 x = y θ = tan^-1(opp / adj)

To activate the hyperbolic mode, press the HYP button. The HYP indicator will be displayed at the top of the display. Then, select the desired trigonometric function.

Note: The behavior of the HYP button can be customized in the calculator settings.

Examples:

HYP sin → sinh (hyperbolic sine)
HYP w → cosh^-1 (inverse hyperbolic cosine)