anonymous
  • anonymous
Find all solutions in the interval [0,2pi] (sinx)(cosx)=0
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
Hi any help is appreciated :)
freckles
  • freckles
if a*b=0 then a=0 or b=0 or both=0
LynFran
  • LynFran
|dw:1437259221024:dw| can you do for cos now?

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anonymous
  • anonymous
Cosx=0 X= cos^-1 0 ...
anonymous
  • anonymous
Sorry this isn't my strength. I'm quite confused 😓
LynFran
  • LynFran
go on...whats cos-1(0)=?
anonymous
  • anonymous
90?
anonymous
  • anonymous
That's what it said when I input it in my calculator
LynFran
  • LynFran
yes 90 degree which is \[\frac{ \pi }{ 2}\]radians
anonymous
  • anonymous
Ok so 0 and pi/2 are the 2 answers?
LynFran
  • LynFran
|dw:1437259779522:dw|
anonymous
  • anonymous
Ok so 0, pi/2, pi and 3pi/2?
LynFran
  • LynFran
|dw:1437259932984:dw|
LynFran
  • LynFran
|dw:1437260051924:dw|
anonymous
  • anonymous
Thank you :)
LynFran
  • LynFran
welcome

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