![Giải thích a) sin (2x + pi/3) = - căn 2/ 2 b) 6 cos^2 x + cos x - 2 = 0 c) căn 3 sin x - cos x = căn 3 Giải giúp em câu b với ạ, em cảm ơn. Giải thích a) sin (2x + pi/3) = - căn 2/ 2 b) 6 cos^2 x + cos x - 2 = 0 c) căn 3 sin x - cos x = căn 3 Giải giúp em câu b với ạ, em cảm ơn.](https://img.hoidap247.com/picture/question/20191229/large_1577609370436.jpg)
Giải thích a) sin (2x + pi/3) = - căn 2/ 2 b) 6 cos^2 x + cos x - 2 = 0 c) căn 3 sin x - cos x = căn 3 Giải giúp em câu b với ạ, em cảm ơn.
Sketch the graphs of the following functions: (i) ϕ(x) = 2 sin (2x – π/3), 0 ≤ x ≤ 7π/3 (ii) Ψ(x) = 4 sin 3 (x – π/4), 0 ≤ x ≤ 2π - Sarthaks eConnect | Largest Online Education Community
Let f(x) = sin^2x + sin^2(x + π/3) + cosx.cos(x + π/3) and g(x) = {(2x : 0 ≤ x < 1), (x + 1/4 : 1 ≤ x < 2) then find g(f(x)) - Sarthaks eConnect | Largest Online Education Community
![How can you prove that sin^2x+sin^2(x+π/3)+sin^2(x-π/3)=3/2? I Trigonometry HOTS 11th Maths - YouTube How can you prove that sin^2x+sin^2(x+π/3)+sin^2(x-π/3)=3/2? I Trigonometry HOTS 11th Maths - YouTube](https://i.ytimg.com/vi/psri_Vz3AEU/hqdefault.jpg)