2010 · Q43
If cos θ ≥ 1/2 in the first quadrant, then which one of the following is correct?
Elementary MathematicsTrigonometry
- Aθ ≤ π/3
- Bθ ≥ π/3
- Cθ ≤ π/6
- Dθ ≥ π/6
Explanation
cos θ ≥ 1/2 in Q1 means θ ≤ 60° = π/3.
If cos θ ≥ 1/2 in the first quadrant, then which one of the following is correct?
Explanation
cos θ ≥ 1/2 in Q1 means θ ≤ 60° = π/3.