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cos45o0
(1)sin60°+cos60 (2)-tan45 osin452
2
(3)cos45°-sin30° (4)sin2300+cos2300
(5)tan45°-sin30°·cos60° (6)
(7)2sin300-cos450 (6)sin600cos600
(9)cos30°sin45°+sin30°cos45° (10)
(11)3cos30°+2sin45°
(13)tan300sin450+tan600cos450
cos2450tan2300 (8)2sin30°+3cos60°-4tan45°sin600?1tan600?2tan450 12)2sin300+3sin600-4tan450
sin300?1(14)tan600?2tan450
(
0000sin30?cos60?_______,tan45?cot60?_______; (15)
1cos60??sin245??tan230??cos30??sin30?4(16)=________________
tan300?tan450(17) 001?tan30?tan45
sin450?cos300000?sin30(cos45?sin60) 03?2cos60
22cos30??cos60?(19)sin230°+cos245°+2sin60°·tan45°; (20)+ sin45°
tan60??tan30?(21) (22) (24)
(25) (26)
(27)
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(30)
(31) (32)
(33)
(34)
(35) (36)
(37) (38)
(39)
(40)sin45°+3tan30°+4cos30°
(41)cos260°-tan45°+sin60°·tan60°.
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