Mathematics
Senior High
Solved
(2)と(3)教えてください！
S3
【24】(数学IStandard : 158ページ: 2)
次の値を求めよ。
(1) sin65°+cos105°+cos155°+sin165°
(2) tan70°(tan160°-tai20°")
(3) (sin40°キsin130°)?+ (cos40°+cos130°)?
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合ってます！助かりました！ありがとうございます！