(Sin^2 55° + sin^2 35°) + ( sin^2 75° + sin^2 15° ) =
Matematika
Nafi29122001
Pertanyaan
(Sin^2 55° + sin^2 35°) + ( sin^2 75° + sin^2 15° ) =
1 Jawaban
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1. Jawaban idznizhahrina
(Sin^2 55° + sin^2 35°) + ( sin^2 75° + sin^2 15° ) =sin²55+cos²(90-35)+sin²75+sin²(90-15)
=sin²55+cos²55+sin²75+cos²75
=1+1
=2