来自郎一民的问题
【已知平面向量a=（1，cosθ），b=（sinθ，2），且a⊥b，则tan（π-θ）之值为______．】
已知平面向量
a=（1，cosθ），
b=（sinθ，2），且
a⊥
b，则tan（π-θ）之值为______．
1回答
2020-04-30 19:16
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陈韬
∵平面向量
a
2020-04-30 19:19:40
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