- Turmeric is propagated through rhizomes instead of seeds.
- Seed rate: 2,500-3,000 kg/ha.
- Spacing: 30 cm row-to-row and 25 cm plant-to-plant.
Explain the construction of a spherical wavefront by using Huygens' principle.
The slope of the tangent to the curve \( x = \sin\theta \) and \( y = \cos 2\theta \) at \( \theta = \frac{\pi}{6} \) is ___________.