Cos² 2x = (1+cos 4x )/2
cos² 6x = (1+cos 12x)/2
subtract to get 1/2 (cos 4x - cos 12x )
= 1/2 (2 sin 4x sin 8x ) as cos A - cos B = 2 [ sin (A+B)/2 sin (A-B)/2 ]
so the answer
Answer:
<h3>
Options A) the extent of non-response and B) the extent of illegitimate responses are correct</h3><h3>A frequency distribution helps determine <u>
the extent of non-response and also the extent of illegitimate responses</u></h3>
Step-by-step explanation:
A frequency distribution helps determine <u>the extent of non-response and also the extent of illegitimate responses </u>
<h3>For :</h3>
- A frequency distribution helps determine the extent of item non-response.
- It also indicates the extent of illegitimate responses.
- Values of 0 and 8 would be illegitimate responses, or errors.
<h3>Hence
Options A) the extent of non-response and B) the extent of illegitimate responses are correct</h3>
Answer:
x=-8
Step-by-step explanation:
