jelaskan cos ( 1980°)
Matematika
ifal16052000
Pertanyaan
jelaskan cos ( 1980°)
1 Jawaban
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1. Jawaban 18Navillera
cos 1980°
= cos (5 x 360 + 180)°
= cos 180°
= cos (180 - 0)°
= - cos 0°
= -1