cos 4x = sin (-22°), untuk -180°
Matematika
puputnurfaizah07
Pertanyaan
cos 4x = sin (-22°), untuk -180°<x<180°
1 Jawaban
-
1. Jawaban SadonoSukirno
cos 4x = sin (-22)
cos 4x = -sin 22
-) cos 4x = cos (90+22)
cos 4x = cos 112
4x = 112
x = 112/4
x = 28°
-) cos 4x = cos (270+22)
cos 4x = cos 292
4x = 292
x = 292/4
x = 73°
-) cos 4x = cos (360+112)
4x = 472
x = 118°
-) cos 4x = cos (360+292)
4x = 652
x = 163°
-) cos 4x = cos -112
4x = -112
x = -28°
-) cos 4x = cos -292
x = -73°
-) cos 4x = cos -472
x = -118°
-) cos 4x = cos -652
x = -163°
hp {-163°, -118°, -73°, -28°, 28°, 73°, 118°, 163°}