Casio fx-9860GII SD - Calculator Operations: Examples; Basic Calculation Examples

CASIO
E-5
3. Examples
Basic Calculation
Example 1: Solve the quadratic equation 3x
2
+ 5x –15=0.
Solve the equation by performing the following calculation:
(–5 +
5
2
+ 4 × 3 × 15
)÷(2s 3).
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B@DAB
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Actual solution: 1.552970177
Example 2: To use the Pythagorean Theorem to determine the hypotenuse of a
right triangle
For a right triangle of side a = 5 cm and sideb=7cm,determine the
hypotenuse by performing the following calculation:
5
2
+ 7
2
.
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V()DVFV
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Actual solution: 8.602325267
 8.6 cm
Example 3: To determine the remaining two sides of right triangle with a
hypotenuse ofc=10cmandanangle of 36° at one end
Determine the length of the two sides by performing the following
calculations: 10sin(36), 10cos(36).
• Use the degree angle unit.
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Actual solution: 5.877852523
 5.9 cm
@?ABE
U
Actual solution: 8.090169944
 8.1 cm
Replay Function
The Replay Function lets you edit the contents of a previously performed
calculation and execute it again.
Pressing B or C will display the last calculation you performed so you can edit it.
• In the Math input/output mode, use the D key to display the calculation you want
to edit, and then B or C.
Example: To execute the calculation
5
2
+ 8
2
, change the 8 to 10, and re-
calculate
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B
BB#@?
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