Cos^2 2x−cos^2 6x=sin4x sin8x please help me prove it

1 answer:

4 0

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

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Consider each of the following relationships. Which school shows the greatest rate of change between male and female students?

ratelena [41]

Answer:

The school C shows the greatest rate of change between male and female students

Step-by-step explanation:

Let

x -----> the number of female students

y ----> the number of male students

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$\frac{y}{x}$

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3 years ago

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earnstyle [38]

Answer:

Step-by-step explanation:

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