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日期:2024-08-20
... ( =_____ (c)商數關係: (tan(=_____(cot(=_____ (d)平方關係(利用畢式定理可得) ( sin2(+cos2=1 ( tan2(+1=sec2( (1+cot2(=csc2( sin2A +cos2A =()2+( )2= =1 ( sin2A +cos2A=1 上式兩邊同除以cos2A,則可得+1= =sec2A (tan2A+1=sec2A 若將sin2A ......看更多