Hitunglah sin 30° + cos 180° + 315°
Matematika
Wawa2001
Pertanyaan
Hitunglah sin 30° + cos 180° + 315°
1 Jawaban
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1. Jawaban A1dy
sin30 = 1/2
cos(180 + 315) = - cos315 = -[tex] \sqrt{2} [/tex]/2
jadi, 1/2 - [tex] \sqrt{2} [/tex]/2