Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 11: giúp em vs sin²3x + cos²( x + π/3 ) = 1

Toán Lớp 11: giúp em vs
sin²3x + cos²( x + π/3 ) = 1

Comments ( 1 )

  1. sin^2 3x+cos^2(x+π/3)=1
    <=>sin^2 3x=sin^2(x+π/3)
    <=>sin3x=±sin(x+π/3)
    <=>\(\left[ \begin{array}{l}sinx=sin(x+\dfrac{π}{3})\\sinx=sin(\dfrac{4π}{3}+x)\end{array} \right.\)
    Tự tính nốt

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Khánh Ly