User Manual

2-29
Input the start point and end point.
b,f,
Input the tolerance value.
b5-e) w
Example 2
When the angle unit setting is degrees, trigonometric function
integration calculation is performed using radians (Angle unit = Deg)
Examples Calculation Result Display
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.
Positive
part (
S
)
Negative part (
S
)
∫
a
b
f
(
x
)
dx =
∫
a
c
f
(
x
)
dx
+
∫
c
b
f
(
x
)
dx
Positive part (S)Negative part (S)
(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.
∫
a
b
f
(
x
)
dx =
∫
a
x
1
f
(
x
)
dx
+
∫
x
1
x
2
f
(
x
)
dx
+.....
+
∫
x
4
b
f
(
x
)
dx
• 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.
Integration Calculation Precautions
• Because numerical integration is used, large error may result in calculated integration
values due to the content of f(x), positive and negative values within the integration interval,
or the interval being integrated. (Examples: When there are parts with discontinuous
points or abrupt change. When the integration interval is too wide.) In such cases, dividing
the integration interval into multiple parts and then performing calculations may improve
calculation accuracy.