The value of $\sqrt{3}$ cosec 60° - sec 60° is

1. 0

2. 1

3. 2

4. -1

The value of $\dfrac{1}{\text{sin 30°}} - \dfrac{\sqrt{3}}{\text{cos 30°}}$ is

1. 2

2. 1

3. $\dfrac{1}{2}$

4. 0

If sec θ. sin θ = 0, then the value of cos θ is

1. 0

2. $\dfrac{1}{\sqrt{2}}$

3. $\dfrac{1}{2}$

4. 1

If sin α = $\dfrac{1}{2},$ then the value of 3 cos α - 4 cos³ α is

1. -1

2. 0

3. 1

4. 2