[toán 11] phương trình lượng giác

L

lovelycat_nd9x

[TEX]\blue{PT \Leftrightarrow sin^2x=sin^62x+1\\ Co\ :\\\left{sin^2x \leq 1 \\ sin^62x+1 \geq 1[/TEX]

[TEX]\blue{\Leftrightarrow \left{sinx=1\\sin2x=0[/TEX]
 
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