precal

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Find all solutions of the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.)
2 cos θ − 1 = 0

  • precal -

    solve for cosθ the way you would for any other variable.

    2cosθ = 1
    cos θ = 1/2

    ta da. Of course, now you have to now how to find θ, but that's no problem, right?

  • precal -

    Find the real solutions of the equation. (Round your answers to three decimal places. Enter your answers as a comma-separated list.)
    3.4x4 − 1.9x2 = 2.2

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