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vb0988650556nb
@vb0988650556nb
July 2022
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розв'яжіть рівняння корінь cos2x+sinx=1
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Johnny21
Cos2x +sinx = 1
cos²x - sin²x+sinx = 1
1 - sin²x - sin²x + sinx = 1
-2sin²x+sinx = 0
sinx(2sinx-1)= 0
sinx = 0
x = πk, k∈z
2sinx = 1
sinx =
x =
arcsin
+ πk, k ∈ z
x =
+πk, k ∈z
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Дмитрий1425
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Answers & Comments
cos²x - sin²x+sinx = 1
1 - sin²x - sin²x + sinx = 1
-2sin²x+sinx = 0
sinx(2sinx-1)= 0
sinx = 0
x = πk, k∈z
2sinx = 1
sinx =
x = arcsin + πk, k ∈ z
x = +πk, k ∈z