Posted by Carl on .
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 
bobpursley,
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