Condition for a trig equation to have a solution (range of the parameter)

1. A.
   4
2. B.
   8
3. C.
   10
4. D.
   2

Tap an option to check your answer.

1. A.
   $\left[-\frac{5}{4},-1\right]$
2. B.
   $\left[-\frac{3}{2},-\frac{5}{4}\right]$
3. C.
   $\left[-\frac{1}{2},-\frac{1}{4}\right]$
4. D.
   $\left[-1,-\frac{1}{2}\right]$

Tap an option to check your answer.

1. A.
   4
2. B.
   8
3. C.
   10
4. D.
   12

Tap an option to check your answer.