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:2024/11/08 06:30:01

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

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+(根号2/2)*(根号2/2)-根号3*(根号3/3)=1/2+1/2-1=0
cos45°-cos60°分之1+sin30°分之1+cos²30°+sin²45°=?
(根号2/2)-1/2分之1+1/2分之1+3/4+根号2/2=(2倍根号2+3)/4
3tan30°+cot45°+cos30°+2sin60°-2tan45°=?
3*(根号3/3)+1+(根号3/2)+2*(根号3/2)-2*1=2倍根号3+2分之根号3-1