Sharp EL-W531X

54
<Example 2>
Operation Display
1
1
0
x
- x
2
1
y =
- x
2
1
y =
dx
O 1
dx
The fan shaped curve at left is given by the equation
Find the area of the fan shape with radius 1 and central
angle 90 .
- x
2
1
1
dx
0
x
dx
Integration calculation
(Function for EL-W506X/EL-W516X/EL-W506)