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
27 I think or something close to that hope that helps
Answer:
13
Step-by-step explanation:
The answer is 14. if n equals 3 and you use the equation instead of n. 3+11 that would equal 14
C is the answer
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Answer:
Square root of 35 or 5.9160797831
Step-by-step explanation:
