## Precalculus (10th Edition)

$\approx -0.035+0.197i$
Evaluate the trigonometric expressions then simplify to obtain: $0.2\cdot (\cos (100^\circ)+i\cdot \sin(100^\circ)) \\=0.2(-0.1736481777+0.984807753i) \\\approx-0.035+0.197i.$