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Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.
HP Recommended

I'm trying to integrate this equation, but there is no make sense result given.

1.PNG

2 REPLIES 2
HP Recommended

You are probably in the HOME screen. Press the CAS button to go into the CAS. This is where you do symbolic calculations.

 

If you did this in home, note that *A-Z* (CAPTIAL A-Z) are defined variables containing 0 by default. Thus when you enter

 

int( U*sin(W*(T-X/V)),X) and evaluate it (note the variables are CAPITAL LETTERS), you are actually typing essentially:

 

int(0*sin(0*(0-X/0),X)

 

As you can see, that probably won't get you what you want. 🙂

 

 

If you ARE in the CAS, you'll get the same exact answer wolfram alpha will give. https://www.wolframalpha.com/input/?i=integrate+u*sin(w*(t-x%2Fv))

 

 

Note that if you see a 180 and a pi in your result, you are trying to do the calcualtion in degrees mode. Tap your upper left corner of the screen, tap the <pi symbol, and you will be in radians. Try it again and you will get your desired result.

 

Post again if you still are having trouble!

TW

Although I work for the HP calculator group as a head developer of the HP Prime, the views and opinions I post here are my own.
HP Recommended

insert multiplication sign between w and the (t-x/v) or rewrite sin(w(t-x/v)) as sin(w*t-(w*x)/v)

Výstřižek.PNG

 

 

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