User manual CASIO FX115ESPLUS

[. . . ] E fx-115ES PLUS fx-991ES PLUS C User's Guide CASIO Worldwide Education Website http://edu. casio. com CASIO EDUCATIONAL FORUM http://edu. casio. com/forum/ Contents Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Sample Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Initializing the Calculator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 2 eW(i)= 245 Note: · If you are planning to perform input and display of the calculation result in polar coordinate format, specify the angle unit before starting the calculation. · The value of the calculation result is displayed in the range 180°. · Display of the calculation result while Linear Display of ­180° is selected will show a and bi (or r and ) on separate lines. CMPLX Mode Calculation Examples (1 ­ i)­1 = 1 + 1 i B (Complex number format: a + bi) 22 ( 1 -W(i))E= (1 + i)2 + (1 ­ i)2 = 0 B ( 1 +W(i))w+( 1 -W(i))w= 1+1i 22 0 To obtain the conjugate complex number of 2 + 3i (Complex number format: a + bi) 12(CMPLX)2(Conjg) 2 + 3 W(i))= 2­3i To obtain the absolute value and argument of 1 + i Bv Absolute Value: 1w(Abs) 1 +W(i)= ' 2 Argument: 12(CMPLX)1(arg)1+W(i))= 45 E-25 Using a Command to Specify the Calculation Result Format Either of two special commands ('r or 'a+bi) can be input at the end of a calculation to specify the display format of the calculation results. The command overrides the calculator's complex number format setting. ' + ' i = 2 45, 2 45 = ' + ' i Bv 2 2 2 2 !2 eW(i)12(CMPLX)3('r )= 2 1-() 45 12(CMPLX)4('a+bi)= 245 '+'i 22 Using CALC CALC lets you save calculation expressions that contain variables, which you can then recall and execute in the COMP Mode (N1) and the CMPLX Mode (N2). The following describes the types of expressions you can save with CALC. · Expressions: 2X + 3Y, 2AX + 3BY + C, A + Bi · Multi-statements: X + Y : X (X + Y) · Equalities with a single variable on the left and an expression including variables on the right: A = B + C, Y = X2 + X + 3 (Use Ss(=) to input the equals sign of the equality. ) To store 3A + B and then substitute the following values to perform the calculation: (A, B) = (5, 10), (7, 20) Math 3 S-(A)+Se(B) Math s Prompts for input of a value for A Current value of A Math 5 = 10 = Math s (or =) Math 7 = 20 = To exit CALC: A E-26 To store A + Bi and then determine ' + i, 1 + ' i using polar 3 3 coordinates (r ) v N2(CMPLX) S-(A)+Se(B)W(i) 12(CMPLX)3('r ) s!3 )= To exit CALC: A Note: During the time from when you press s until you exit CALC by pressing A, you should use Linear Display input procedures for input. CMPLX Math Using SOLVE SOLVE uses Newton's Law to approximate the solution of equations. Note that SOLVE can be used in the COMP Mode (N1) only. The following describes the types of equations whose solutions can be obtained using SOLVE. · Equations that include variable X: X2 + 2X ­ 2, Y = X + 5, X = sin(M), X +3=B+C SOLVE solves for X. An expression like X2 + 2X ­ 2 is treated as X2 + 2X ­ 2 = 0. · Equations input using the following syntax: {equation}, {solution variable} SOLVE solves for Y, for example, when an equation is input as: Y = X + 5, Y Important: · If an equation contains input functions that include an open parenthesis (such as sin and log), do not omit the closing parenthesis. · The following functions are not allowed inside of an equation: , d/dx, , , Pol, Rec, ÷R. To solve y = ax2 + b for x when y = 0, a = 1, and b = ­2 Math Sf(Y)Ss(=)S-(A) S)(X)w+Se(B) Math 1s(SOLVE) Prompts for input of a value for Y Current value of Y Math 0 = 1 =- 2 = Current value of X E-27 Math Input an initial value for X (Here, input 1): 1= Solution screen To exit SOLVE: A Note: During the time from when you press 1s(SOLVE) until you exit SOLVE by pressing A, you should use Linear Display input procedures for input. Important: · Depending on what you input for the initial value for X (solution variable), SOLVE may not be able to obtain solutions. If this happens, try changing the initial value so they are closer to the solution. · SOLVE may not be able to determine the correct solution, even when one exists. · SOLVE uses Newton's Law, so even if there are multiple solutions, only one of them will be returned. · Due to limitations in Newton's Law, solutions tend to be difficult to obtain for equations like the following: y = sin(x), y = ex, y = ' . x Solution Screen Contents Solutions are always displayed in decimal form. Equation (The equation you input. ) Math Variable solved for Solution (Left Side) ­ (Right Side) result "(Left Side) ­ (Right Side) result" shows the result when the right side of the equation is subtracted from the left side, after assigning the obtained value to the variable being solved for. [. . . ] Important: Removing the battery will cause all of the calculator's memory contents to be deleted. Press 1A(OFF) to turn off the calculator. · To ensure that you do not accidentally turn on power while replacing the battery, slide the hard case onto the front of the calculator. Remove the cover as shown in the illustration and replace the battery, taking care that its plus (+) and minus (­) ends are facing correctly. [. . . ]