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A.=sin220°+cos220°
B.=sec220°-tan220°
C.=sin220°+cos270°
D.=csc231°-cot231°
下列条件中，能确定三点A、B、P不共线的是
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A．
B．
C．
D．
A.=sin22 008°+cos22 008°
B. =sec22 008°-tan22 008°
C. =sin22 008°+sin22 008°
D. =csc22 008°-cot22 008°
=sin220°
+cos220°
=sec220°
-tan220°
=sin220°
+cos270°
=csc231°
-cot231°
=sin22 008°
+cos22 008°
=sec22 008°
-tan22 008°
=sin22 008°
+sin22 008°
=csc22 008°
-cot22 008°