2018 · Q62
If 0
Elementary MathematicsTrigonometry
- Aθ < Φ
- Bθ > Φ
- Cθ + Φ = 90°
- DNo conclusion can be drawn
Explanation
On (0, pi/2), the cosine function is strictly decreasing. Hence cos(theta) < cos(phi) forces theta > phi. Hence option B.
If 0
Explanation
On (0, pi/2), the cosine function is strictly decreasing. Hence cos(theta) < cos(phi) forces theta > phi. Hence option B.