Trigonometric functions functions are affected by the calculator's angle mode. Angles may be expressed in degrees, radians, grads or cycles.

Calculates the absolute value r of two values x and y, as indicated by the illustration below.

Absolute Value

When complex numbers are enabled, this function accepts a single complex value of the form of *abs<x +
yi>*. When complex numbers are disabled, it accepts two separate values either side of the function, in
the form of *<x> abs <y>*.

When used to graph a function, it returns a positive number given a single real value.

Calculates the argument a of two values x and y, as indicated by the illustration below.

Argument

The arg function result is the counterclockwise angle from the positive x axis to the ray from the origin through the point (x, y). It is defined unless both x and y are 0. The results range from -Π to +Π when expressed in radians.

When complex numbers are enabled, this function accepts a single complex value of the form of *arg<x +
yi>*. When complex numbers are disabled, it accepts two separate values either side of the function in
the form *<x> arg <y>*.

The resulting value will be in units specified the calculator's angle mode.

Arc-cosine; the reverse operation of calculating the cosine. Accepts a single value input. .

DRGC allows the input value to be converted to the units designated by the calculator's current angle mode.

**Example:** *Sine of 45 degrees in radians mode.*

Put the calculator into the radian mode by selecting **Modes→Angle
Mode→Radians**.

Now key in:

[sin]45[DRGC]and selectDeg[ENTER]Displays: 0.70710678118654752

Hyperbolic shift key — allows input of hyperbolic variations of sin, cos, tan, sin^{-1},
cos^{-1} and tan^{-1}.

Converts polar coordinates to cartesian (rectangular) coordinates, where the input is expressed in terms of angle and radius. The input angle should be expressed in the units specified by the calculator's angle mode.

When complex numbers are enabled, this function accepts a single complex input in the form of *P►R(r +
ti)* and returns a complex result in the form of (x + yi). Additionally, the x (real) component is placed in
the **rx** memory register, and the y (imaginary) component is stored in **ty**.

Polar & Rectangular

**Complex Example:**

[P►R] 72 [;] 1.2(radians)[ENTER]Displays: 26.0897583223204976 + 67.1068141896402972i

If complex numbers are disabled, two values are accepted separately, in the the form of *<r> P►R
<t>*, and only the x result is returned directly. The calculated y value can be retrieved by recalling
it from the **ty** memory register.

**Real Number Example:**

72 [P►R] 1.2(radians)[ENTER]Displays: 26.0897583223204976[RCL] [ty]Displays: 67.1068141896402972

See also: R►P.

Converts cartesian (rectangular) coordinates to polar coordinates, where the result is expressed in terms of angle and radius. The resulting angle will be in units specified the calculator's angle mode. This function is the reverse operation of P►R.

Polar & Rectangular

When complex numbers are enabled, this function accepts a single complex input in the form of *R►P<x +
yi>* and returns a complex result in the form of (r + ti). Additionally, the radius (real) component is
placed in the **rx** memory register, and the angle (imaginary) component is stored in **ty**.

If complex numbers are disabled, two values are accepted separately, in the the form of *<x> R►P
<y>*, and only the radius r result is returned directly. The calculated angle value can be retrieved
by recalling it from the **ty** memory register.

See also: P►R.

Sine. Accepts a single value input.

For example:

[sin] 0.7 [ENTER]Displays: 0.64421768723769105 (radians)

Arc-sine; the reverse operation of calculating the sine. Accepts a single value input.

Hyperbolic sine. Press **[hyp]** prior to pressing **[sin]**.

For example:

[hyp] [sin] 0.7 [ENTER]Displays: 0.7585837018395335 (radians)

Arc-tangent; the reverse operation of calculating the tangent. Accepts a single value input.

See also: Math Functions & Operators