cosπ/6+根号3sinπ/6=?
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cosπ/6+根号3sinπ/6=?cosπ/6+根号3sinπ/6=?cosπ/6+根号3sinπ/6=?√3；cosπ/6=√3/2,sinπ/6=1/2所以cosπ/6+√3sinπ/6=√3/
cosπ/6+根号3sinπ/6=?
cosπ/6+根号3sinπ/6=?
cosπ/6+根号3sinπ/6=?
√3；cosπ/6=√3/2,sinπ/6=1/2所以cosπ/6+√3sinπ/6=√3/2+√3/2=√3
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