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whattheheck
@whattheheck
July 2022
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Решите уравнение cos x + sin x = 0
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kirichekov
Verified answer
Cosx+sinx=0
sinx=-cosx |: cosx≠0
sinx/cosx=-cosx/cosx
tgx=-1
x=arctg(-1)+πn, n∈Z
x=-π/4+πn, n∈Z
1 votes
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Answers & Comments
Verified answer
Cosx+sinx=0sinx=-cosx |: cosx≠0
sinx/cosx=-cosx/cosx
tgx=-1
x=arctg(-1)+πn, n∈Z
x=-π/4+πn, n∈Z