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anonymous

  • 5 years ago

Verify the trig identity: 3sin^2x + 4cos^2x = 3 + cos^2x

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  1. anonymous
    • 5 years ago
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    \[3\sin ^{2} \theta +4\cos ^{2}\theta = 3+\cos ^{2}\theta\]

  2. anonymous
    • 5 years ago
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    Recall,\[4\cos ^{2}\theta =3\cos ^{2}\theta +\cos ^{2}\theta\]

  3. mathmagician
    • 5 years ago
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    the answer is 0

  4. anonymous
    • 5 years ago
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    I don't think they want to you to 'solve' the equation, just show that one side is equal to the other :)

  5. mathmagician
    • 5 years ago
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    Well, its the same thing- if you solve the equation and show, that the result is 0, the identity is proved

  6. anonymous
    • 5 years ago
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    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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