1道高二数学选修2-1的题
如图,正方形ABCD-A'B'C'D'中,M,N分别为A'B',CC'的中点,P为AD上一动点,记α为异面直线PM与D'N所成的角,则α的取值范围是()A.{π/2}B....
如图,正方形ABCD-A'B'C'D'中,M,N分别为A'B',CC'的中点,P为AD上一动点,记α为异面直线PM与D'N所成的角,则α的取值范围是( )
A.{π/2}
B.{α│π/6≤α≤π/2}
C.{α│π/4≤α≤π/2}
D.{α│π/3≤α≤π/2} 展开
A.{π/2}
B.{α│π/6≤α≤π/2}
C.{α│π/4≤α≤π/2}
D.{α│π/3≤α≤π/2} 展开
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