计算:sin230°+2sin60°+tan45-tan60°+cos230°=______.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/29 07:49:51
计算:sin230°+2sin60°+tan45-tan60°+cos230°=______.
![计算:sin230°+2sin60°+tan45-tan60°+cos230°=______.](/uploads/image/z/18717030-54-0.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9Asin230%C2%B0%2B2sin60%C2%B0%2Btan45-tan60%C2%B0%2Bcos230%C2%B0%3D______%EF%BC%8E)
原式=(
1
2)2+2×
3
2+1-
3+(
3
2)2=
1
4+
3+1-
3+
3
4=2.
1
2)2+2×
3
2+1-
3+(
3
2)2=
1
4+
3+1-
3+
3
4=2.
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-
【sin30°/(sin60°-cos45°)】—(根号下(1—tan60°)²)—tan45°
计算:sin²30°+cos²45°+根号2sin60°×tan45°
计算:sin30°+cos60°+tan45°=______.
计算:sin260°+cos60°-tan45°=______.
计算:(1)根号2sin45°+cos²60°-根号3tan60°+sin30°·tan45°
sin60°/cos30°-tan45° “/”是分之的意思
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
计算tan60°+2sin45°-2cos30°的结果是______.