Cos 45° cos 30° - sin 45° sin 30°=...
Matematika
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Pertanyaan
Cos 45° cos 30° - sin 45° sin 30°=...
1 Jawaban
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1. Jawaban ArZain
cos.45°.cos 30° - sin 45°.sin 30°
= 1/2√2.1/2√3 - 1/2√2.1/2
= 1/4√6 - 1/4√2
= 1/4(√6 - √2)