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lisabon 2012 [21]
3 years ago
11

How do I solve these trigonometric functions?

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
6 0

Answer:

see attached

Step-by-step explanation:

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Answer:

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You can use the formula:

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-->

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or you can figure it out (basically derive the above formula):

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How many pairs do you have?  Well, it's just the number of numbers: 1-18 = 18 numbers (divide by 2) = 9 pairs)

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Step-by-step explanation:

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