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Trigonometry, Trigonometric/inverse trigonometric functions, Hyperbolic/ inverse hyperbolic functions – Casio FX 65 User Manual

Page 9: Coordinate conversion, Logarithmic functions

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FX 65 Training guide

Trigonometry

Be sure to select the angle unit (D, R, G) you want to use before beginning a calculation.

Trigonometric/Inverse Trigonometric Functions

To calculate the sine, cosine, or tangent of the displayed angle.
Example (in degree mode): [30] [sin] (= .5)

To calculate the arcsine, arccosine, or arctangent.
Example (in degree mode): [.5] [SHIFT] [sin] (= 30)

Hyperbolic/ Inverse Hyperbolic Functions

To calculate the hyperbolic sine, cosine, or tangent of the displayed angle.
Example (in degree mode): [3.6] [hyp] [sin]

To calculate the hyperbolic arcsine, arccosine, or arctangent of the displayed angle.
Example (in degree mode): [30] [hyp] [SHIFT] [sin

-1

]


Coordinate Conversion

You can convert between rectangular and polar coordinates.
Make sure you are using the correct angle unit (D, R, G) before starting your calculation.

[SHIFT] [R-P] Rectangular to polar coordinate conversion
[SHIFT] [P-R] Polar to rectangular coordinate conversion
[SHIFT] [X-Y] Use this operation to switch between the two coordinates produced by the

conversion operation.
Example:

To convert polar coordinates (r = 2,

θ = 60) to rectangular

coordinates (x, y).

[2] [SHIFT] [P-R] [60] [=]

This gives you the x value.

[SHIFT] [X-Y]

This gives you the y value.


Logarithmic Functions

You can find logarithms, natural logarithms, and antilogarithms.

[log]

Calculates the common logarithm of the displayed value.

[100]

[log]


[ln]

Calculates the natural logarithm (base e) of the displayed value.

[90]

[ln]


[SHIFT] [10

x

]

Calculates the common antilogarithm of the displayed value,
which is 10 raised to the power of the value.

[2]

[SHIFT]

[10

x

]


[SHIFT] [e

x

]

Calculates the natural antilogarithm of the displayed value, which
is e raised to the power of the value.

[1]

[SHIFT]

[e

x

]

9

References the Casio FX-65 User’s Guide

Casio FX-65 Fraction calculator