Cos -420° = ...? Cos -480° = ...?
Matematika
enipurnama7441
Pertanyaan
Cos -420° = ...?
Cos -480° = ...?
Cos -480° = ...?
2 Jawaban
-
1. Jawaban kezia420
0.5
-0.5
:))))))))))))))) -
2. Jawaban Aftermath67
Cos x =cos (x+360)
cos-420 = cos(-60)=1/2
cos-480 = cos-120 = -1/2