How to check dy/dx in my ti84?

[Impackt]

Homework Statement

find dy/dx: y=4sinx-5cosx+x

Homework Equations

The Attempt at a Solution

y=4sinx-5cosx+x

answer = dy/dx=4cosx+5sinx+1


I know this may look simple, but i want to learn how to check my answers in my ti84 to be sure that I'm correct.

 

[n!kofeyn]

The TI-84 can't take derivatives. Only the TI-89 or Voyage 200 calculators can do that, since they're the only ones that carry TI's computer algebra software. Casio and HP also make calculators that can do this.

 

[Impackt]

Thanks for the quick reply.

So none of these programs could help? http://www.ticalc.org/pub/83plus/basic/math/calculus/index.html

 

[n!kofeyn]

Thanks for the quick reply.

So none of these programs could help? http://www.ticalc.org/pub/83plus/basic/math/calculus/index.html

Those will be highly unreliable and will only handle special cases. The TI-84 is only able to numerically differentiate a function. To my knowledge, it can only graph some derivatives and spit out the value of the derivative at a specific point.

I recommend using Wolfram Alpha. For example, to take the derivative of the function you gave, you would have the following http://www.wolframalpha.com/input/?i=d/dx+(4*sin(x)-5*cos(x)+x)".

 

[Impackt]

Those will be highly unreliable and will only handle special cases. The TI-84 is only able to numerically differentiate a function. To my knowledge, it can only graph some derivatives and spit out the value of the derivative at a specific point.

I recommend using Wolfram Alpha. For example, to take the derivative of the function you gave, you would have the following http://www.wolframalpha.com/input/?i=d/dx+(4*sin(x)-5*cos(x)+x)".

Thanks for linking me to that site! I can use it to help me study