How to make 'solve' work?

2014 12 21
1 个回答
更新时间：2014 12 21
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0 个投票

Hello, I have just recently started using Matlab and are still learning the basics. I have tried to solve an equation but the 'solve' tool does not seem to work for me. I've put in the following:
solve(cos(x/50)-1/sqrt(2)==10^-3, x)
And it gives me the error: Undefined function or variable 'x'. How am I meant to make it work?

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-12-21

0 个投票

solve('cos(x/50)-1/sqrt(2)==10^(-3)')

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Marcus
Marcus 2014-12-21
I'm getting the error: Undefined function 'solve' for input arguments of type 'char'. Is there a problem with my version of Matlab maybe?
Azzi Abdelmalek
Azzi Abdelmalek 2014-12-21
Try this
syms x
solve(cos(x/50)-1/sqrt(2)==10^(-3))
Azzi Abdelmalek
Azzi Abdelmalek 2014-12-21
Try this
syms x
solve(cos(x/50)-1/sqrt(2)==10^(-3))
Azzi Abdelmalek
Azzi Abdelmalek 2014-12-21
Try this
syms x
solve(cos(x/50)-1/sqrt(2)==10^(-3))
Marcus
Marcus 2014-12-21
I get the error: Undefined function 'syms' for input arguments of type 'char'. I am using the student version but I was sure I would still be able to use such basic features?
Marcus
Marcus 2014-12-21
I found the error, I apparently didn't have the Symbolic Math Toolbox installed.

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2014-12-21

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2014-12-21

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