Answer:
A. 12
Step-by-step explanation:
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
It is cotangent
Sin-CSC
cosin-sec
tan-cot
1: 5
2: 1
3: -11
4: 0
5: 22