Cos 56 - sin 56 cot 28
Matematika
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Pertanyaan
Cos 56 - sin 56 cot 28
1 Jawaban
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1. Jawaban Anonyme
TriGonoMetRi
cos 56 - sin 56 cot 28
= cos 56 - sin 2(28) . cos 28/sin 28
= cos 2(28) - 2 sin 28 cos 28 cos 28 /sin 18
= 2 cos² 28 - 1 - 2 cos² 28
= -1 ✓