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dem82 [27]
3 years ago
12

3. The weekly sales of a magazine increased

Mathematics
2 answers:
lisov135 [29]3 years ago
7 0

Answer:

20%

Step-by-step explanation:

KiRa [710]3 years ago
3 0

Answer:

b. 20%

Step-by-step explanation:

20% is the am mount of increase

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The cofunction of cos is sin(90-x)

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Now you have sin(9PI/18 - 4PI/18)

Simplify:

Sin(5PI/18)

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