Question

2sin(θ − 20 ) =1 for ≤θ ≤ 360

Answer 1

Answer:

$2sin( \alpha - 20) = 1 \\ sin( \alpha - 20) = \frac{1}{2} \\ sin( \alpha - 20) = sin30 \: \: |because. \: sin30 = \frac{1}{2} | \\ ( \alpha - 20) = 30 \\ \alpha = 50$