Step 1: Federal vs. Unitary systems
- A federal government is one in which powers are divided between the central and state governments (e.g., India, USA, Belgium).
- A unitary government is one in which all powers are concentrated in the central government (e.g., Sri Lanka).
Step 2: Analyze the options
- India: Federal system with powers divided between Union and States.
- Sri Lanka: Has a unitary government, not federal.
- USA: One of the oldest federal systems in the world.
- Belgium: Federal system with power-sharing between communities and regions.
Step 3: Conclusion
Sri Lanka does not have a federal government.
\[
\boxed{\text{Sri Lanka}}
\]
The value of $\dfrac{1+\cot^2 \theta}{1+\tan^2 \theta}$ will be: