anonymous
  • anonymous
How do I solve this problem? Solve for cosθ in sin^2θ + cos^2θ = 1
Mathematics
schrodinger
  • schrodinger
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terenzreignz
  • terenzreignz
This? \[\large \sin^2\theta+\cos^2\theta=1\]
anonymous
  • anonymous
yes
terenzreignz
  • terenzreignz
Well, let's see... How to break this to you... cosθ can literally be any value from [-1 , 1] Let me explain... the value of cosθ depends on the value of θ, right?

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anonymous
  • anonymous
yes
terenzreignz
  • terenzreignz
Well, unfortunately (fortunately?) ANY value of θ would make this statement true sin²θ + cos²θ = 1
hartnn
  • hartnn
he/she needs to solve for cos so, subtract sin^2 term from both sides, what u get ?
terenzreignz
  • terenzreignz
Oops... Must have been overexcited :) My bad
anonymous
  • anonymous
Im trying to write it but its giving me a hard time
anonymous
  • anonymous
±√(1 + sin2Θ)
hartnn
  • hartnn
did you mean \(\pm \sqrt{1-\sin^2 \theta}\) ??
anonymous
  • anonymous
yes I pasted the wrong one Sorry, my computer is acting really crazy today
hartnn
  • hartnn
ohh..if you meant that, then you are correct.
anonymous
  • anonymous
ok thanks you made this very easy, thank you.. :)
hartnn
  • hartnn
glad to hear :) welcome ^_^

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