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2 siθ + 3 sin θ − 2 = 0 and θ is acute. Find θ.

Competition practiceTrigonometry
  • A30°
  • B60°
  • C45°
  • D90°

Step-by-Step Solution

(2 sin θ − 1)(sin θ + 2) = 0. sin θ = −2 is impossible, so sin θ = 1/2 and θ = 30°.
Answer: A) 30°

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