题目内容

(本小题满分13分) 已知函数.

(1)若,且为第一象限角,求y的值;

(2)若,求y的值.

 

【答案】

解:(1) x为第一象限角, 

,代入函数·············································································· 3分

···································································· 6分

(2) ········································ 10分

     ∴ ························································ 13分

 

【解析】略

 

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