Delta FX 65 , 9

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] [10x] Calculates the common antilogarithm of the displayed value,

which is 10 raised to the power of the value.

[2] [SHIFT] [10x]

[SHIFT] [ex] Calculates the natural antilogarithm of the displayed value, which

is e raised to the power of the value.

[1] [SHIFT] [ex]

References the Casio FX-65 User’s Guide Casio FX-65 Fraction calculator