Himpunann penyelesaian persamaan 2 cos (x-x/3)=√3 untuk 0<=<2x
Persamaan Trigonometri
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2 cos ( x - π/3) = √3
cos ( x - π/3) = √3 / 2
cos ( x - π/3) = cos π/6
( x - π/3) = π/6
Rumus persamaan cosinus :
x = a + K. 2π
x = -a + K.2π
x = a + K .2π
x – π/3 = π/6 + K.2π
x = π/6 + π/3 + K.2π
x = π/2 + K.2π
- Untuk K = 0
x = π/2 + 0
x = π/2
- Untuk K = 1
x = π/2 + (1).2π
x = π/2 + 2π
x = 5π/2 (TM)
x = -a + K. 2π
x – π/3 = – π/6 + K. 2π
x = -π/6 + π/3 + K.2π
x = π/6 + K. 2π
- untuk K = 0
x = π/6 + K. 2π
x = π/6
- untuk K = 1
x = π/6 + K. 2π
x = π/6 + (1). 2π
x = π/6 + 2π
x = 13π/6 (TM)
Maka HP = { π/2 , π/6 }