Question

Sin(3pi/14)-sin(pi/14)-sin(5pi/14)

Answer 1

sin3π/14-(sinπ/14+sin5π/14)=sin3π/14-2sin3π/14cosπ87=sin3π/14(1-2cosπ/7)

Answer 2

Приравниваем к 0 2 части?

Answer 3

Извините

Answer 4

Не о том подумала

Answer 5

*Ухожу*

Answer 6

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