Casio FX-CG20 AU User Manual page 81

Example 2 When the angle unit setting is degrees, trigonometric function
integration calculation is performed using radians (Angle unit = Deg)
Note the following points to ensure correct integration values.
(1) When cyclical functions for integration values become positive or negative for different
divisions, perform the calculation for single cycles, or divide between negative and positive,
and then add the results together.
(2) When minute fluctuations in integration divisions produce large fluctuations in integration
values, calculate the integration divisions separately (divide the large fluctuation areas into
smaller divisions), and then add the results together.
• Pressing A during calculation of an integral (while the cursor is not shown on the display)
interrupts the calculation.
• Always use radians (Rad mode) as the angle unit when performing trigonometric
integrations.
• An error (Time Out) occurs whenever no solution that satisfies the tolerance value can be
obtained.
Positive
S
part ( )
Negative part (
∫ ∫
b b
f(x)dx = f(x)dx =
a a
Positive part (
∫ ∫ ∫ ∫
x x
b b
1 1
f(x)dx = f(x)dx = f(x)dx + f(x)dx +
a a a a
2-32
Examples Calculation Result Display
S
)
∫ ∫ ∫ ∫
c c b b
f(x)dx + f(x)dx + f(x)dx f(x)dx
a a c c
S
) Negative part (
∫ ∫ ∫ ∫
x x
b b
2 2
f(x)dx +.....+ f(x)dx +.....+
x x x x
1 1 4 4
S
)
f(x)dx f(x)dx