The tutor shows the easy definite integral function on the Sharp EL-520W.

While indefinite integrals such as

∫(xsinx)dx

remain out of reach from calculators I know, the definite integral

∫₀^Π(xsinx)dx

is easy to find on the Sharp EL-520W.

You want to be in rads to perform this calculation.

Step 1:

To make X appear, key in alpha RCL. Then key in sin, then X again.

Step 2:

Press the ∫dx key.

Step 3:

You now see a? You will answer with the lower limit of integration: in this case, 0. The calculator then prompts b? It’s asking for the upper limit; you answer, in this case, Π.

Step 4:

Now you see n? The default seems to be 100; you can set it to more or less. As I understand, n sets how many points the calculator will check along the curve to find the area underneath it.

I always leave n at 100. I press =

Step 5:

calculalting! appears across the screen, and can remain there for around 30 seconds. However, you’ll eventually see, in this case,

∫ dx=3.141592655

I think you’ll agree the Sharp EL-520W is great for evaluating definite integrals. Good luck with it!

HTH:)

Source:

Sharp EL-520W Operation Manual.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.