1三角函数计算(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))60sin45(cos30sin60cos2330cos45sin000000(18).000045tan30tan145tan30tan(19)sin230°+cos245°+2sin60°·tan45°;(20)22cos30cos60tan60tan30+sin45(21)(22)(23)2425(26)(27)22829(30)31(32)333435(36)(37)3839)60sin45(cos30sin60cos2330cos45sin000000(40)(41)(42)(43)(44)4546(47)48