30% is needed because i believe it is i am really trying hope u get it right <span />
Answer:
Step-by-step explanation:
z = 2(cos7π/6 +isin7π/6)
cos7π/6 = cos(π/6+π) = - cos(π/6) = - √3 /2
sin7π/6 = sin(π/6+π) = - sin(π/6) = - 1 /2
so : z = 2( - √3 /2+i(- 1 /2))
z= - √3 - i .....(standard form)
D) (10 x 55) + (10 x 55) + (10 x 55) + (10 x 55)
use distributive rule to factor out 55:
55 (10+10+10+10) = 55×40
