anonymous
  • anonymous
medal to the person who can help me!! Find cos theta if sin theta=0.56
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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LynFran
  • LynFran
whats 0.56 in fraction form?
anonymous
  • anonymous
14/25
LynFran
  • LynFran
now do u know the Pythagorean triple (7,24,25)?

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anonymous
  • anonymous
no i don’t….
anonymous
  • anonymous
If \[\sin (θ)=\frac{ opposite side }{ hypotenuse }=\frac{ 14 }{ 25 }\] and \[\cos(θ)=\frac{ adjacentside }{ hypotenuse }=\frac{ x }{ 25 }\] and it is a right triangle, so \[14^{2}+x ^{2}=25^{2}\] then \[x=\sqrt{429}\] so \[\cos (θ)=\frac{ \sqrt{429} }{ 25 }\]
anonymous
  • anonymous
soo..is 25 the answer then? i thought i had to use the pythagorean identity..
LynFran
  • LynFran
no i made an error ...mistook 14 for 24...lol
anonymous
  • anonymous
ohhh so i had to find the triple to put into the equation.. GOT IT
anonymous
  • anonymous
thnx xx :)
LynFran
  • LynFran
@Natriumhydrid correct

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