1+2sen(x)cos(x)=1⟹2sen(x)cos(x)=0⟹sen(2x)=01 plus 2 space s e n space open paren x close paren cosine x equals 1 ⟹ 2 space s e n space open paren x close paren cosine x equals 0 ⟹ space s e n space open paren 2 x close paren equals 0
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cos(x)⋅(2sen(x)+1)=0cosine x center dot open paren 2 space s e n space open paren x close paren plus 1 close paren equals 0