sin²48°+sin²42°=?

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sin²48°+sin²42°=?sin²48°+sin²42°=?sin²48°+sin²42°=?=sin²48°+sin&#

sin²48°+sin²42°=?
sin²48°+sin²42°=?

sin²48°+sin²42°=?
=sin²48°+sin²42°
=sin²48°+cos²48°
=1