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ashking1

  • one year ago

Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5

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  1. freckles
    • one year ago
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    is that sin(2x) or sin^2(x)?

  2. ashking1
    • one year ago
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    sin^2(x)?

  3. freckles
    • one year ago
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    ok then you have a quadratic in terms of sin(x)

  4. freckles
    • one year ago
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    maybe you can see it better if you replace sin(x) with u

  5. freckles
    • one year ago
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    \[7u^2-14u+2=-5\]

  6. freckles
    • one year ago
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    do you know how to solve that for u?

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