- Cigarette and Cigar Industry: Major raw material for global tobacco product manufacturing.
- Chewing and Snuff Industry: Used in different forms like gutkha, snuff, and chewing tobacco.
- Pharmaceutical Industry: Nicotine extracted from tobacco is used in nicotine patches and gum for smoking cessation.
- Pesticides and Biopesticides: Nicotine-based products are used as natural insecticides.
- Revenue Generation: Tobacco contributes significantly to India’s economy through exports and employment.
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 ___________.