Coa 150°+sin 45°+1/2 cotg(-330)=
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Pertanyaan
Coa 150°+sin 45°+1/2 cotg(-330)=
1 Jawaban
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1. Jawaban SadonoSukirno
cos 150 + sin 45 + ½ cot 330
= cos (180-30) + ½√2 + ½ cot (360-30)
= -cos 30 + ½√2 + ½ - cot 30
= -½√3 + ½√2 - ½√3
= ½√2 - √3