Pertanyaan

Nilai cos 7 5 0 − cos 1 5 0 adalah....

Nilai $cos 7 5^{0} - cos 1 5^{0}$ adalah....

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Y. Laksmi

Master Teacher

Mahasiswa/Alumni Universitas Negeri Semarang

Jawaban terverifikasi

Pembahasan

$cos 75 to the power of 0 minus cos 15 to the power of 0 equals short dash 2 sin open parentheses fraction numerator 75 to the power of 0 plus 15 to the power of 0 over denominator 2 end fraction close parentheses sin open parentheses fraction numerator 75 to the power of 0 plus 15 to the power of 0 over denominator 2 end fraction close parentheses space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space short dash 2 sin space 45 to the power of 0 space sin space 30 to the power of 0 space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space short dash 2 open parentheses fraction numerator square root of 2 over denominator 2 end fraction close parentheses open parentheses 1 half close parentheses space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space short dash 1 half square root of 2$