Mathematics
Senior High
(4)を教えてください
4 次のベクトル a, について, 内積とそのなす角0を求めよ。
(1) a=(2, 3), 6=(-1, 5)
(3) a=(2, 1), (4, -8)
(2)=(-√3,1),T= (√3,-3)
(4)=(1,1),(1+√3, 1-√3)
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