[单选题,20分] 已知角β的终边过(cos30°,sin30°),则sinβ为A.1.5B.0.5

[单选题,20分] 已知角β的终边过(cos30°,sin30°),则sinβ为A.1.5B.0.5C.1D.30°

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Hi, Tom. How are you?A、Great. Thank you. And you?B

Hi, Tom. How are you?A、Great. Thank you. And you?B、Yes, I am.C、How are you?D、How

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