第1578题:1986年高考全国卷
当 x∈[−1,0]x \in [-1,0]x∈[−1,0] 时,下列关系式正确的是( ).
A. π−arccos(−x)\pi -\arccos(-x)π−arccos(−x) =arcsin(1−x2)=\arcsin(\sqrt{1-x^2})=arcsin(√1−x2)
B. π−arcsin(−x)\pi -\arcsin(-x)π−arcsin(−x) =arccos(1−x2)=\arccos(\sqrt{1-x^2})=arccos(√1−x2)
C. π−arccos(x)\pi -\arccos(x)π−arccos(x) =arcsin(1−x2)=\arcsin(\sqrt{1-x^2})=arcsin(√1−x2)
D. π−arcsin(x)\pi -\arcsin(x)π−arcsin(x) =arccos(1−x2)=\arccos(\sqrt{1-x^2})=arccos(√1−x2)