If sec θ - tan θ = k, then the value of sec θ + tan θ is

1. 1 - $\dfrac{1}{\text{k}}$

2. 1 - k

3. 1 + k

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

If θ is an acute angle of a right triangle, then the value of

sin θ cos(90° - θ) + cos θ sin (90° - θ) is

1. 0

2. 2 sin θ cos θ

3. 1

4. 2 sin² θ

The value of 3 tan² 26° - 3 cosec² 64° is

1. 0

2. 3

3. -3

4. -1

Statement (i) : sin² θ + cos² θ = 1

Statement (ii) : cosec² θ + cot² θ = 1

Which of the following is valid ?

1. only (i)

2. only (ii)

3. both (i) and (ii)

4. neither (i) nor (ii)