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If tanθ + secθ = √3 and 0° < θ < 90°, then θ equals:

Competition practiceTrigonometry
  • A30°
  • B45°
  • C60°
  • D15°

Step-by-Step Solution

The conjugate gives secθ − tanθ = 1/√3. Adding: 2secθ = √3 + 1/√3 = 4/√3, so secθ = 2/√3 and cosθ = √3/2, i.e. θ = 30°. Check: tan30° + sec30° = 0.577 + 1.155 = 1.732 = √3.
Answer: A) 30°

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