Question

Tolong Caranya gimana

Answer 1

Hasil perkalian matriks :

1) tan(x).cos²(x) + sin(x).cos(x) =  1/2 a

sin(x).cos(x)+sin(x)+cos(x) = 1/2 a

2.sin(x).cos(x) = 1/2 a

sin(2x) = 1/2 a

2) cos²(x)+tan(x).sin(x).cos(x) = 1/2 b

cos²(x) + sin²(x) = 1/2 b

1/2 b = 1  => b = 2

b = 2a

2 = 2a

a = 1

sin(2x) = 1/2 a = 1/2

sin(2x) = sin(π/6) atau sin(5π/6)

2x = π/6 atau 5π/6

x = π/12 atau 5π/12 (nomor 2 dan 4)