满足的一组的值是                    

A.     B.       C.      D.

A.α=,β=                   B.α=,β=

C.α=,β=                        D.α=,β=

满足cosαcosβ=+sinαsinβ的一组α、β的值是

1. A.
   α=，β=
2. B.
   α=，β=
3. C.
   α=，β=
4. D.
   α=，β=