已知 O 为坐标原点,点 P 1 cos α , sin α , P 2 cos β , - sin β , P 3 cos α + β , sin α + β , A 1 , 0 ,则( )
A O P 1 ⃗ = O P 2 ⃗
A P 1 ⃗ = A P 2 ⃗
OA ⃗ ⋅ OP ⃗ 3 = O P 1 ⃗ ⋅ O P 2 ⃗
OA ⃗ ⋅ O P 1 ⃗ = O P 2 ⃗ ⋅ O P 3 ⃗
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