cos60°+sin45°×cos45°-tan60°×tan30°=?cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°=?3tan30°+cot45°+cos30°+2sin60°-2tan45°=?

来源：学生作业帮助网编辑：作业帮时间：2024/05/01 02:07:26

cos60°+sin45°×cos45°-tan60°×tan30°=?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

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°=√2/2-1/（1/2）+1/（1/2）+（√2/2）^2
=√2/2+1/2=(√2+1)/2
3tan30°+cot45°+cos30°+2sin60°-2tan45°=3*√3/3+1+√3/2+2*√3/2-2=1+1-2+√3/2+√3=3√3/2

几点放开了吧

√2/2-2+2+(√3/2)*(√3/2)+√2/2=√2+3/4
√3+1+√3/2+2*√3/2-2=5√3/2-1

cos60°+sin45°/cos60°-sin45° + cos60°-cos45°/cos60°+cos45° cos30°* sin45 °+ cos60°* cos45° sin45°+cos45° sin45°×cos60°+sin45° （cos60°+sin45°）/（cos60°-sin45°）+（cos60°-cos45°）/（cos60°+cos45°）等于多少？[刚才在百度直接算的-5.99999……我自己算的-6 =-=] sin60°×cos60°+sin45°×cos45°-sin30°×cos30°等于多少 sin30° sin45° sin60° cos30° cos45° cos60° 以此类推,都等于多少 sin45°·cos45°-tan60°+sin60°/cos60°等于多少 sin45°/(cos60°-tan60°)+cos45°×cos30°= 计算cos45°-cos60°分之sin30°-2sin45°+根号3tan30° cos45°•tan45°+ 根号3.tan30°-2cos60°•sin45° sin45°/(cos60°-tan60°)+cos45°×cos30°=. 计算:cos45°.tan45°+ .tan30°－2cos60°.sin45° COS45°×TAN45°+根号3×TAN30°-2cos60°×sin45° cos60°+tan60° 2/根号2sin45°+sin60°-2cos45° (1+Cos45°-Sin30°)(1-Sin45°+Cos60°)= 2cos60°+tan平方60°-4sin45°cos45° sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少