write 2=5cis 11pie/6 in standard form.

Answer 1

Your question makes no sense to me as written but
2 = 5 cos 11 pi/6 + 5 i sin 11 pi/6
= 5 e^i(11 pi/6)
12 pi/6 = 2 pi is a full circle
11 pi/6 is a full circle - pi/6
2/5 = cos (12 pi/6 -pi/6) + i sin(12 pi/6 - pi/6)

2/5 = cos (-pi/6) + i sin (-pi/6)
2/5 = +sqrt (3)/2 - i/2

Answer 2

I'm not sure if the answer's a) 5sqrt3/2-5/2i b) 5sqrt3/2+5/2i c) -5sqrt3/2-5/2i d) -5sqrt3/2+5/2i

Answer 3

check for typo why do you have 2 on the left

Answer 4

if you had x and not 2 on the left it would be a

Answer 5

Okay thanks so much! that's right