anonymous
  • anonymous
if sin x=.21 what is cos x?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
use sinx^x+cosx^+1=0
anonymous
  • anonymous
\[sinx^2+cosx^2+1=0\]
anonymous
  • anonymous
this is hard..im bad at trig

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anonymous
  • anonymous
i dont get it..
anonymous
  • anonymous
\[cosx^2=1-sinx^2\] \[cosx^2=1-(0.21)^2\] \[cosx^2=1-0.0441\] \[cosx^2=0.9559\] take square root both sides \[cosx=0.977\]
anonymous
  • anonymous
do u understandd? if yes please click on best answer.
anonymous
  • anonymous
thankks:)
anonymous
  • anonymous
thankks:)
anonymous
  • anonymous
u r welcome always.

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