(2/3)根号2-cos a)=0.2.已知a为锐角,化简下列各式.(1)sin 30度cot a(1-tan a).(2)sin(

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(2/3)根号2-cos a)=0.2.已知a为锐角,化简下列各式.(1)sin 30度cot a(1-tan a).(2)sin(
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(2/3)根号2-cos a)=0.2.已知a为锐角,化简下列各式.(1)sin 30度cot a(1-tan a).(2)sin(
(2/3)根号2-cos a)=0.2.已知a为锐角,化简下列各式.(1)sin 30度cot a(1-tan a).(2)sin(

(2/3)根号2-cos a)=0.2.已知a为锐角,化简下列各式.(1)sin 30度cot a(1-tan a).(2)sin(
(2/3)根号2-cos a)=0.2.已知a为锐角,化简下列各式.(1)sin 30度cot a(1-tan a).(2)sin(
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