Casio FX 65 - Manual (Page 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] [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 ]
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References the Casio FX-65 User’s Guide Casio FX-65 Fraction calculator