Answer:
-0.866
Step-by-step explanation:
cos(–150°) = -0.866
A. 12
i= use complicated conjugate to search out definite quantity of 8 + 12i
i = 12i
i= twelve × ei 90°
i = twelve × (cos 90° + i sin 90°)
r = |i| = twelve
-6/4 or -1 1/2
the radius found on the letter c
