anonymous
  • anonymous
find exact value of the expression cos^-1 (-1)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
explanation would be nice also :)
campbell_st
  • campbell_st
are you talking about 1/cos or arccos.... very different things...
anonymous
  • anonymous
i dunno its gives me that in the book i have

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dumbcow
  • dumbcow
prob arccos or inverse cos. think of your unit circle, what angle makes cosA = -1 ?
campbell_st
  • campbell_st
are you doing questions on solving trig equations or solving inverse trig equations...
campbell_st
  • campbell_st
could be sec(x) = -1
anonymous
  • anonymous
just cos ^-1 (1) looks like arc cos
anonymous
  • anonymous
dumbcow my answer is 0/2 ?
anonymous
  • anonymous
http://www.wolframalpha.com/input/?i=cos%5E-1++%28-1%29
anonymous
  • anonymous
tyvm :)
anonymous
  • anonymous
Welcome

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