Calculator gives 0.999999 for cos(-0.175) but textbook says 100

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starchild75
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Homework Statement



I typed in cos of -0.175 and I got .999999 and the physics book says it's 100. help!

Homework Equations





The Attempt at a Solution

 

Discussion

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starchild75 said:

Homework Statement



I typed in cos of -0.175 and I got .999999 and the physics book says it's 100. help!

Homework Equations





The Attempt at a Solution



cos() of anything is never going to be 100. It is always in the range of [-1,1]. You would have to scale it to reach 100, that is 100*cos()
 
i think this is enough for hint...

cos[-x]=cos x...
 
[tex]cos^{-1} (-0.175) = 100^0[/tex]