Need symbolic instead of numeric answer for integration
When i integrate the function given by the guidebook, x*sin(x), it gives me the answer as -2572.13 instead of sin(x) - x*cos(x). I type it in as (integrate symbol)(x*sin(x),x). No limits, so it really shouldnt be able to express it numerically. Any ideas?
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Press diamond then ENTER to convert a symbolic result to numeric. To have all results come out in symbolic form, press MODE to bring up the mode screen. Press F2 to get to the second page. Use the arrow keys to move down to the "Exact/Approx" line, press right-arrow, and select "APPROXIMATE". Press ENTER to save the change.
Hi danagasta, If my last instructions did not work then you need to reset your RAM. You are missing the negative sign and, I have no idea where you got the absolute value inside the brackets. Yes, the absolute value are used in books and, on integral tables but, I can asure you that the Ti 89 should not have produce them in this answer. I'll stand behind that In( -cos(x) / (sin(x)-1)) is the correct answer. You can go ahead and simplify after the calculation to get the answer you want but, that is the good answer that Ti 89 is going to give you for the integral of sec(x). Errors that do not match the suspected, I am pretty sure that Texas Instruments would have you clear the RAM. I do not like resetting the RAM but, I could not find the cause to why you got the answer you did. And so far no other expert has produced a solution to convince me otherwise. I was not able to come up with any of the 3 answers MiB8888 did on my Ti 89. I am not saying that they are not good answers, they are book and integral tables answers. You are not going to get them on the Ti 89.
Sorry to disappoint you but the Casio FX-9750Gplus does not handle symbolic calculations. It does not have a Computer Algebra System or CAS. It can however calculate the numerical integration of a function between two limits, as well as the first and second derivatives of a function at a given point.
To access the numerical integration and differentiation,
Hello, Configure the calculator to be in MathIO : [SHIFT][MODE][1:MathIO]. Press the Integral key, the one judt beloe the [ALPHA] key. The template of the integral appears, with the cursor in larger rectangle. Enter the function the screen displays the integral, a small upper sqaure, and a small lower square. The left parenthesis of the function is already supplied by the calculator. Press [ALPHA] X to enter the argument of the function. Press the right parenthesis. Remain the limits. Use left arrow to move the cursor just before the s of sin and press down arrow to enter a numerical value for the lower limit. Press the up arrow to move cursor in upper square. Key in the numerical value of the upper limit. Press [=].
Warning. To have meaningful result, make sure the angle unit used is conform to the problem you are trying to solve.
I assume that by anti-derivative you mean the integral. I believe that you can only calculate definite integrals with this calculator. A definite integral requires that you specify the function e.g ln(x), the variable, x, the numerical value of the lower limit, 0.5 and the numerical value of the upper limit , say 2.
Try this: INT(sin(x),x, 0, pi/2)
This calculator can only give numerical values of definite integrals. If you want to perform symbolic calculations, you shoul look towards some other, more sophisticated Casios Casio ClassPad 330, or the TI Voyage200PLT, or the TI89Titanium. etc.
Hello, This calculator can only perform NUMERICAL DEFINITE integrals. Which meansyou have to supply the numerical value of the lower limit and the numerical value of the upper limit. The result is a numerical value. The calculator cannot perform symbolic calculus.
If the function is simple you find the integral in tables of integrals where you will see that INT(log(X)dx=x(log(x)+1). Some calculators that have a CAS (computer algebra system) can manipulate symbolic expression, but not theCasio FX-991ES.
You ask it the value of the integral of log(X) from X=1 to X=3 and it will give you 0.5627748004