Question

Trigonometri kelas 10
caranya gimana, jawabannya A

Answer 1

Disederhanain, trus nanti ketemu X = 45° maka sin x = ½√2

Answer 2

tan(x) + cot(x) = 2

(sin(x))/(cos(x)) + (cos(x))/(sin(x)) = 2

sin²(x) + cos²(x) = 2.sin(x).cos(x)

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

sin(2x) = 1

sin(2x) = sin(90°)

2x = 90°

x = 45°

sin(x) = sin(45°) = 1/2 . √2