Math Is Fun Forum

dadon09

Guest

square root sec function

Hi all..

Just wanted to know how I work out Y on a calculator (sorry for the silly question!).. I don't have a sec function in calculator so I'm using 1/cos.. but I keep getting an error.

Where

Thanks

TheDude

Member

Registered: 2007-10-23

Posts: 361

Re: square root sec function

First evaluate cos(pi*a / W).  You can see that a/W is 1/5, so we're left with cos(pi / 5).  Punch that in your calculator, then divide 1 by that number.  Many if not all scientific calculators have a reciprocal button, use that if you have it.  Otherwise store the result of cos(pi / 5) in your calculator's memory and divide 1 by that result.  Then just take the square root.

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Wrap it in bacon

dadon09

Guest

Re: square root sec function

thank you

well appreciated!