Toán Lớp 11: a) √3 tanx1=0 b) 2cos(x - π/3) - √3=0 c) tan2x - 3tanx2=0 d) sin2x - 3cosx3=0

Question

Toán Lớp 11:  a) √3 tanx+1=0 b) 2cos(x - π/3) - √3=0 c) tan^2x - 3tanx+2=0 d) sin^2x - 3cosx+3=0, giúp em giải bài này ạ, em cảm ơn thầy cô và các bạn nhiều.

huyenmi76 · Answer

a)         3   tan  x  &#160;  +  &#160;  1  &#160;  =  &#160;  0  &#160;   &#8660;  &#160;  tan  &#160;  x  =  &#160;    -   3    3   &#160;   &#8660;  &#160;  x  &#160;  =  &#160;    -  &#960;   6   +  &#160;  k&#960;  &#160;  &#160;  &#160;  &#160;  (  k  &#160;  &#8712;  &#160;  Z  )   b)     2  cos    x  -   &#960;  3     &#160;  -  &#160;   3   =  &#160;  0    cos    x  -   &#960;  3     &#160;  =    3   2     &#8658;  x  -   &#960;  3   =   &#960;  6   +  &#160;  k  2  &#960;    &#160;  ho&#7863;c  &#160;  &#160;  &#160;    &#160;  &#160;  &#160;  &#160;  &#160;  x  -   &#960;  3   =    -  &#960;   6   +  &#160;  k  2  &#960;  &#160;    &#8658;  x  =   &#960;  2   +  &#160;  k  2  &#960;  &#160;    ho&#7863;c  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  (  k  &#8712;  Z  )    &#160;  &#160;  &#160;  &#160;  &#160;  x  =   &#960;  6   +  &#160;  k  2  &#960;  &#160;

Toán Lớp 11: a) √3 tanx+1=0 b) 2cos(x – π/3) – √3=0 c) tan^2x – 3tanx+2=0 d) sin^2x – 3cosx+3=0

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