kΣ Calculations

With Σ(, you can obtain the sum of an input f(x) expression for a specific range. Σ calculations are performed using the following formula.

Σ( f(x), a, b) = f(a) + f(a + 1) + .... + f(b)

f(x): Function of X (All non-X variables are treated as constants.)

a: Calculation range start point

b: Calculation range end point

•a and b are integers in the range of –1 ⋅ 1010 < a < b < 1 ⋅ 1010.

•The calculation step is fixed at 1.

•∫(, d/dx(, Pol(, Rec(, and Σ( cannot be used within f(x), a, or b.

•Pressing Awill interrupt an ongoing Σ calculation.

Appendix <#035> Σ (X + 1, 1, 5) = 20

kRectangular-Polar Coordinate Conversion

Rectangular

Polar Coordinates

Coordinates (Rec)

(Pol)

•Coordinate conversion can be performed in the COMP, STAT, MATRIX, and VECTOR calculation modes.

Converting to Polar Coordinates (Pol)

Pol(X, Y) X: Specifies the rectangular coordinate X value

Y:Specifies the rectangular coordinate Y value

•Calculation result θ is displayed in the range of –180°< θ <180°.

•Calculation result θ is displayed using the calculator’s default angle unit.

•Calculation result r is assigned to variable X, while θ is assigned to Y.

Converting to Rectangular Coordinates (Rec)

Rec(r,θ) r : Specifies r value of polar coordinate

θ: Specifies θ value of polar coordinate

•Input value θ is treated as an angle value, in accordance with the calculator’s default angle unit setting.

•Calculation result x is assigned to variable X, while y is assigned to Y.

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