Question

√2(cos π/12+i sin π/12)/2(cos 5π/6+ i sin 5π/6)​

Answer 1

Answer:

2 sin 5π/12 cos π/12 = 2 sin 75° cos 15° = 2 sin (90° – 15°) cos 15° = 2 cos 15° cos 15° = 2 cos2 15° = cos2 × 15° + 1 = cos 30° + 1 = √3/2 + 1