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Math 11th Grade

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Use Demoivre's Theorem to find the fourth roots of -16. Leave the four roots in trigonometric form. How the heck do i do this?

  • Math 11th Grade -

    well, if you have 16@520; 16@180;16@900;16@1260

    dividing by 4, roots are 4@130, 4@45;4@225;4@315

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