The value of sin B - cos A is;

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

2. 1

3. 0

4. none of these

The value of cos 60° - sin 90° + 2 cos 0° is :

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

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

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

4. $1\dfrac{1}{2}$

Statement 1: The angle C of a right angled triangle is 90°, then tan A = cot B.

Statement 2: Since, angle C of triangle ABC = 90°.

∴ ∠A + ∠B = 90° ⇒ ∠A = 90° - ∠B

1. Both the statements are true.

2. Both the statements are false.

3. Statement 1 is true, and statement 2 is false.

4. Statement 1 is false, and statement 2 is true.

Statement 1: If 3 cos A = 4, sec A = $\dfrac{3}{4}$.

Statement 2: 3 cos A = 4 ⇒ cos A = $\dfrac{4}{3}$ and sec A = $\dfrac{1}{\text{cos A}} = \dfrac{3}{4}$.

1. Both the statements are true.

2. Both the statements are false.

3. Statement 1 is true, and statement 2 is false.

4. Statement 1 is false, and statement 2 is true.