“sinA=”是“A=30°”的A.充分不必要条件

“sinA=”是“A=30°”的

A.充分不必要条件 B.必要不充分条件

C.充要条件 D.既不充分也不必要条件

答案

答案：B

解析

:sinA=

A=30°,A=30°sinA=.

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“sinA=”是“A=30°”的A.充分不必要条件

答案

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