神马作文网cos60°+sin45°×cos45°-tan60°×tan30°=?
来源：学生作业帮 编辑：神马作文网作业帮 分类：数学作业 时间：2024/11/16 23:01:19
cos60°+sin45°×cos45°-tan60°×tan30°=?
cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°=?
3tan30°+cot45°+cos30°+2sin60°-2tan45°=?
cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°=?
3tan30°+cot45°+cos30°+2sin60°-2tan45°=?
cos60°+sin45°×cos45°-tan60°×tan30°
=1/2+(√2)/2×(√2)/2-√3×(√3)/3
=1/2+1/2-1
=0
cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°
=(√2)/2-2+2+3/4+1/2
=(2√2)/4+3/4+2/4
=(2√2+5)/4
3tan30°+cot45°+cos30°+2sin60°-2tan45°
=√3+1+(√3)/2+√3-2
=(5√3)/2-1
=1/2+(√2)/2×(√2)/2-√3×(√3)/3
=1/2+1/2-1
=0
cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°
=(√2)/2-2+2+3/4+1/2
=(2√2)/4+3/4+2/4
=(2√2+5)/4
3tan30°+cot45°+cos30°+2sin60°-2tan45°
=√3+1+(√3)/2+√3-2
=(5√3)/2-1
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
sin45°/(cos60°-tan60°)+cos45°×cos30°=
三角函数的特殊角的值tan30°cos30°sin30°tan45°cos45°sin45°tan60°cos60°si
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
计算cos45°-cos60°分之sin30°-2sin45°+根号3tan30°
Sin30°=?；Sin45°=?；Sin60°=?；Cos30°=?；Cos45°=?；Cos60°=?；tan30°
cos30°* sin45 °+ cos60°* cos45°
比如tan60°,2sin45°,3tan30°
cos30°+sin45°+tan60°分之1-tan30°=?
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
根号【cos45°-cos30°】*2-tan60°分之tan45°+sin45°
sin60°×cos60°+sin45°×cos45°-sin30°×cos30°等于多少