Math Is Fun Forum

DaveRobinsonUK1

Member

Registered: 2011-12-01

Posts: 12

Inverse Function

Hi All

I have come across this problem and it's giving me some jip.

I have a function

I would like to be able to put in the field of view and then solve for the focal length. Is this possible, what with
there being 2 internal variables?

Many thanks in advance.

David

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I see it, but I don't believe it.

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Inverse Function

Not without knowing 'width' too.

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“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
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bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Inverse Function

Hi;

You can solve for it but there will still be one more variable.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.