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jigglygurl2

  • 3 years ago

please help explain this trig problem. Solve the equation on the interval [0.2π):12 cos^2x-9=0

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  1. Mertsj
    • 3 years ago
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    1. Add 9 to both sides 2. Divide both sides by 12 3. Take the square root of both sides (remember a number has 2 square roots.) 4. Tell the 4 angles between 0 and 2 pi that have the given cosines.

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