Answer:

Step-by-step explanation:
The range of the sine and cosine functions is
.
This means that the maximum value the basic sine and cone functions is 1 and the minimum value is -1.
This means that the two functions are bounded above and below.
The correct answer is B.
Answer:

Step-by-step explanation:
Given expression:

Remove parentheses:

Collect like terms:

Combine like terms:

The answer is BC + CD = BD