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AlexFokin [52]
3 years ago
15

Determine the sign of cos pi divided by seven without using a calculator.

Mathematics
1 answer:
7nadin3 [17]3 years ago
3 0
Check the picture below.

now, when you get a fraction of π for the angle, is just really like grabbing π and dividing it in that many pieces, and the angle, is a fraction of π and therefore on those pieces.

π/7 is clearly less than 7π/7 which is π, notice the 7-pieces split in the picture.

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