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li1713
@li1713
June 2022
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Упростить выражение tg(x - П/4) - tg(x +П/4).
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nKrynka
Решение
tg(x - π/4) - tg(x + π/4) = sin(x - π/4 - x - π/4) / [cosx * cosπ/4] =
= √2 sin(- π/2) / cosx = - √2 / cosx
1 votes
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Answers & Comments
tg(x - π/4) - tg(x + π/4) = sin(x - π/4 - x - π/4) / [cosx * cosπ/4] =
= √2 sin(- π/2) / cosx = - √2 / cosx