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November 01, 2025, 03:53:25 pm
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Author Topic: Evaluate cos(pi/8)  (Read 12390 times)  Share 

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jasopan

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Re: Evaluate cos(pi/8)
« Reply #30 on: April 18, 2010, 09:27:43 pm »
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Yup, all clear now, thanks for clearing that up
Edit sorry another one, if x is an acute angle, and then we are asked to find sin(x/2) are all tanx/2 sinx/2 cosx/2 still positive? do we have to state the new domain is pi/4>x>0?
EDIT2 nvm, i understand it now ;D
« Last Edit: April 18, 2010, 09:41:13 pm by jasopan »
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