Electrical mathQuestion 151 of 1506

A right triangle has an opposite side of 3 m and an adjacent side of 4 m. What is angle θ?

  1. 36.9°
  2. 53.1°
  3. 48.6°
  4. 41.4°
Show answer

Correct answer: 36.9°

tan θ = opposite ÷ adjacent = 3 ÷ 4 = 0.75, and the angle with that tangent is 36.9°.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 1.5: Trigonometry Functions

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Questions last reviewed: 18 October 2026