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celltx
Level 1
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Solved!

HP Prime CAS Can't Solve Obvious

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Math Class Calculator site gives an example of a simple quation that HP Prime CAS gives a strange answer:

 

tan(x)*cos(x)*sin(x)  which is expected to be sin(x)^2, but their HP Prime gives an error. My Prime gives -0.5*cos(2x)+0.5 instead.

 

Any suggestion how to forse it to return sin(x)^2?

 

Here is the link to the review:

 

https://mathclasscalculator.com/index.php/calculators/comparison-reviews/ti-nspire-cx-cas-vs-hp-prim...

 

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Joe_Horn
Level 8
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Set your CAS Setting for Simplify to Minimum. Then do this:

 

tan-cos-sin.png

-Joe-
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celltx
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Nice. Then, I wonder what is the use case for setting Simplify to Maximum?

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Jan_D
Level 6
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The error messages on the site you refer to are due to the fact that the multiplication signs (*) have been  omitted.

 

In CAS 3sin(x) and sin(x)cos(x) are not allowed.

 

It should be 3*sin(x) and sin(x)*cos(x).

 

The most recent update gives a "Syntax Error" message in these cases.

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