If cosec θ − cot θ = $\dfrac{1}{3}$, then the value of cosec θ + cot θ is :

1. 1

2. 2

3. 3

4. 4

If sin θ − cos θ = 0, then the value of sin θ + cos θ is :

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

2. $\sqrt{2}$

3. $\dfrac{1}{4}$

4. $\dfrac{3}{4}$

If sec θ + tan θ = x, then sec θ is equal to :

1. $\dfrac{x^2 + 1}{x}$

2. $\dfrac{x^2 − 1}{x}$

3. $\dfrac{x^2 + 1}{2x}$

4. $\dfrac{x^2 − 1}{2x}$

If sin θ − cos θ = 0, then the value of (sin⁴ θ + cos⁴ θ) is :

1. $\dfrac{1}{4}$

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

3. $\dfrac{3}{4}$

4. 1