Quay lại đáp án

	2	sửa đáp án
$sinx +cosx=1\Leftrightarrow sin^2x+cos^2x+2sinxcosx= $\Leftrightarrow$ sin2x=0(vi sin^2x+cos^2x=1;2sinxcosx=sin2x) $$\Leftrightarrow x=k\pi$ $sinx +cosx=1\Leftrightarrow sin^2x+cos^2x+2sinxcosx= $\Leftrightarrow$ sin2x=0(vi sin^2x+cos^2x=1;2sinxcosx=sin2x) $$\Leftrightarrow x=k\pi$ $sinx +cosx=1\Leftrightarrow sin^2x+cos^2x+2sinxcosx= $\Leftrightarrow$ sin2x=0(vi sin^2x+cos^2x=1;2sinxcosx=sin2x) $$\Leftrightarrow x=k\pi$

	1	tạo mới
$sinx +cosx=1\Leftrightarrow sin^2x+cos^2x+2sinxcosx=0$ $\Leftrightarrow$ $sin2x=0(vi sin^2x+cos^2x=1;2sinxcosx=sin2x)$ $\Leftrightarrow x=k\pi$

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hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
hoahoa.nhynhay: . 11/5/2018 1:39:47 PM
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hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:48 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:49 PM
hoahoa.nhynhay: . 11/5/2018 1:39:50 PM
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