(1)sin260°+cos260 (2)oo45sin45cos-tan450
(3)cos45°-sin30° (4)sin2300+cos2300
(5)tan45°-sin30°·cos60° (6) 020230tan45cos
(7)2sin300-cos450 (6)sin600cos600 (8)2sin30°+3cos60°-4tan45°
(9)cos30°sin45°+sin30°cos45° (10)00045tan260tan160sin
(11)3cos30°+2sin45° (12)2sin300+3sin600-4tan450
(13)tan300sin450+tan600cos450 (14)00045tan260tan130sin
(15)_______60cot45tan_______,60cos30sin0000;
(16)30sin30cos30tan4145sin60cos22=________________
(17)000045tan30tan145tan30tan
)60sin45(cos30sin60cos2330cos45sin000000
(19)sin230°+cos245°+2sin60°·tan45°; (20)22cos30cos60tan60tan30+ sin45°
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(40)sin45°+3tan30°+4cos30°
(41)cos260°-tan45°+sin60°·tan60°.
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37
(76):1
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