4√3( 1/2 sin12- √3/2 cos12)/sin484√3(1/2 sin12-√3/2 cos12)/sin48
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4√3(1/2sin12-√3/2cos12)/sin484√3(1/2sin12-√3/2cos12)/sin484√3(1/2sin12-√3/2cos12)/sin484√3(1/2sin12-
4√3( 1/2 sin12- √3/2 cos12)/sin484√3(1/2 sin12-√3/2 cos12)/sin48
4√3( 1/2 sin12- √3/2 cos12)/sin48
4√3(1/2 sin12-√3/2 cos12)/sin48
4√3( 1/2 sin12- √3/2 cos12)/sin484√3(1/2 sin12-√3/2 cos12)/sin48
负四倍根号三
(√3tan12-3)/[sin12*(4(cos12)^2-2)]
4√3( 1/2 sin12- √3/2 cos12)/sin484√3(1/2 sin12-√3/2 cos12)/sin48
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