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Kreker1
@Kreker1
August 2022
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nKrynka
Решение
cost = 1/4
- π/2 < t < 0 - правая нижняя четверть окружности
sint = - √(1 - cos²t) = - √(1 - 1/16) = - √(15/16) = - √15 / 4
tgt = sint / cost = (-
√15
/
4) / (1/4) = -
√15
ctgt = 1/tgt = - 1/√15
2 votes
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Answers & Comments
cost = 1/4
- π/2 < t < 0 - правая нижняя четверть окружности
sint = - √(1 - cos²t) = - √(1 - 1/16) = - √(15/16) = - √15 / 4
tgt = sint / cost = (- √15 / 4) / (1/4) = - √15
ctgt = 1/tgt = - 1/√15