2 tan² X - 7 Tan X + 3 =0

Materi Trigonometri

Misal tan x = a, maka
2a^2 - 7a + 3 = 0
(2a - 1)(a-3) = 0
a = 1/2 atau a = 3
tan x = 1/2 atau tan x = 3
x = 26,57° atau x = 71,57° (gunakan kalkulator/tabel trigonometri)
ATAU
x = 26,57° + 180° = 206,57° atau
x = 71,57° + 180° = 251,57°
Jadi,
HP = {26,57° ; 71,57°; 206,57°; 251,67°}