anonymous
  • anonymous
If cos x = .75, what is sin x? 0.87 0.75 0.66 0.69
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
okay so you have to solve for x and then plug that value into the sin(x) function
anonymous
  • anonymous
looks like they want the answer to be positive. sin(x) = sqrt(1 - cos^2(x))
anonymous
  • anonymous
do sqrt(1 - (0.75)^2)

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anonymous
  • anonymous
so it would be 0.66?
anonymous
  • anonymous
or would you round?
anonymous
  • anonymous
actually i think its just a simple arccos question \[\cos(x) = .75\] \[x = \cos^-1(.75)\] and then plug that value into sin(x)
anonymous
  • anonymous
ohhh ok thanks
anonymous
  • anonymous
but either way you get the same answer .661
anonymous
  • anonymous
Thanks alot!

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