Nilai sin 330∘ + 2 cos 240∘ −sin 210∘  adalah ...

Pertanyaan

Nilai sin space 330 degree space plus space 2 space cos space 240 degree space minus sin space 210 degree space adalah ...

  1. -2

  2. -1

  3. 0

  4. 1

  5. 2

R. Diah

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

s i n space 330 to the power of o plus space 2 space c o s space 240 to the power of o minus space s i n space 210 to the power of o  equals s i n space left parenthesis 360 to the power of o minus 30 to the power of o right parenthesis space plus space 2 space c o s space left parenthesis 180 to the power of o plus 60 to the power of o right parenthesis space minus space s i n space left parenthesis 180 to the power of o plus 30 to the power of o right parenthesis  equals negative s i n space 30 to the power of o plus 2 left parenthesis negative c o s space 60 to the power of o right parenthesis minus left parenthesis negative s i n space 30 to the power of o right parenthesis  equals negative 1 half plus 2 left parenthesis negative 1 half right parenthesis minus left parenthesis negative 1 half right parenthesis  equals negative 1

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Tanpa menggunakan tabel atau kalkulator hitunglah nilai dari: g. Sin (−330∘)

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