Mark the correct alternative in the following:

Let , where 0 ≤ θ ≤ 2π. Then,

Mark the correct alternative in the following:

If A + B + C = π, then the value of is equal to

Mark the correct alternative in the following:

The number of distinct real roots of lies in the interval is

Mark the correct alternative in the following:

If , then x =

Mark the correct alternative in the following:

If , then