1 §1 三角函数计算题1
1.填表
2. 常见公式
? 平方关系：1cos sin 22=+αα；
? 乘积关系：1)90tan(tan =-??αα；
? 商的关系：αα
αcos sin tan =.
3. 计算题
(1)?+?30cos 30sin 22 (2)?+?45cos 45sin 22 (3)?+?60cos 60sin 22
(4)?+?60sin 30sin 22 (5)?+?30cos 45sin 22 (6)?+?45cos 60sin 22
(7)o o
45sin 45cos -tan450 (8)cos45°-sin30° (9)tan45°-sin30°·cos60°
(10)020
230tan 45cos (11)2sin300-cos450 (12)sin600cos600
(13)2sin30°+3cos60°-4tan45° (14)cos30°sin45°+sin30°cos45° (15)00045tan 260tan 1
60sin -- (16)3cos30°+2sin45° (17)2sin300+3sin600-4tan450 (18)tan300sin450+tan600cos450
(19)00045tan 260tan 1
30sin -- (20)_______60cot 45tan _______,60cos 30sin 0000=+=+
(21)?-?+?+?-?30sin 30cos 30tan 41
45sin 60cos 22
(22)000
045tan 30tan 145tan 30tan ?-+
(23))60sin 45(cos 30sin 60cos 2330cos 45sin 0
0000
0---+ (24)22cos 30cos 60tan 60tan 30?+????+ sin45°
(25)sin 230°+cos 245°sin60°·tan45° (26)sin45°+3tan30°+4cos30°
(27)cos 260°-tan45°+sin60°·tan60° (28)cos30°-tan30°tan60°+sin45°
(29)?????
+?30cos -60tan 06cos 03sin 54tan (30)?
???
?+???45sin 60cos 30tan -60cos 60cos 30sin 2-30sin 22