DominiRican1013
  • DominiRican1013
Which of the following are identities? A. sin6(x)=2sin3(X)cos3(x) B. (sin(x)+cos(x))^2=1+sin^2(x) C. sin3(x)-sin(x)/cos3(x)+cos(x)=tan(x) D. sin3(x)/sin(x)cos(x)=4cos(x)-sec(x)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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LynFran
  • LynFran
A for sure is one of the options...let me check the rest...
LynFran
  • LynFran
B false...
LynFran
  • LynFran
https://www.symbolab.com/solver/trigonometric-identity-calculator/Prove%20%5Cfrac%7Bsin3x-sinx%7D%7Bcos3x%2Bcosx%7D%3Dtanx/?origin=enterkey

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anonymous
  • anonymous
I got C
DominiRican1013
  • DominiRican1013
So it would be A and C
LynFran
  • LynFran
and D
DominiRican1013
  • DominiRican1013
I tried solving D on the website you o on and it said cannot solve :/
DominiRican1013
  • DominiRican1013
But okay A,C, and D
LynFran
  • LynFran
https://www.symbolab.com/solver/trigonometric-identity-calculator/Prove%20%5Cfrac%7Bsin3x%7D%7Bsinxcosx%7D%3D4cosx-secx/?origin=enterkey
DominiRican1013
  • DominiRican1013
I typed it the same way you did :/ that's weird
DominiRican1013
  • DominiRican1013
All were correct....
LynFran
  • LynFran
lol...ok im off to bed good night every one..except "B"
DominiRican1013
  • DominiRican1013
good night

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