anonymous
  • anonymous
Verify the trig identity: 3sin^2x + 4cos^2x = 3 + cos^2x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
\[3\sin ^{2} \theta +4\cos ^{2}\theta = 3+\cos ^{2}\theta\]
anonymous
  • anonymous
Recall,\[4\cos ^{2}\theta =3\cos ^{2}\theta +\cos ^{2}\theta\]
mathmagician
  • mathmagician
the answer is 0

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anonymous
  • anonymous
I don't think they want to you to 'solve' the equation, just show that one side is equal to the other :)
mathmagician
  • mathmagician
Well, its the same thing- if you solve the equation and show, that the result is 0, the identity is proved
anonymous
  • anonymous
That is true but schools have standard or conventional ways of doing it; leaving one side the same and breaking down the other.

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