Sin 20 × sin 240 × tan 45 ÷ cos 70 × cos 210 × tan 120 =
Matematika
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Pertanyaan
Sin 20 × sin 240 × tan 45 ÷ cos 70 × cos 210 × tan 120 =
1 Jawaban
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1. Jawaban ariyat
sin 20 × sin 240 × tan 45
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cos 70 × cos 210 × tan 120
sin 20 × sin (180 + 60) × 1
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cos(90-20)×cos(270-60)×tan(180-60)
sin 20 × -sin 60
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sin 20 × -sin 60 × -tan 60
1 / -tan 60
1 / -√3
(-1/3)√3