bantuin soal trigonometri kelas X, ntar ku kasih jawaban terbrainly

jawab

BC = x
a.  tan 50 = BC/AC
AC = BC/ tan 50
AC = x/ tan 50

b. tan 20 = BC/ DC
DC  = BC/tan 20
DC = x /tan 20

DC = DA + AC
x/tan20  = 75 + x/ tan 50
x/(0,36)= 75   + x /1,19
x/ (0,36) - x/ (1,19) = 75
 ( 1/ 0,36  - 1/1,19) x = 75
(2,78 - 0,84) x  = 75
1,94 x = 75
x = 75/1,94
x = 38,66