(1997•陕西)计算:sin60°+3tan30°•cos60°(tan37°•tan53°−2cot45°)•cot
不用计算器求值:tan30°+sin60°1−cos60°
tan30° sin30° cos30° tan60° sin60° cos60° tan45°
sin60 sin30 cos60 cos30 sin45 cos45 tan30 tan60 tan45°各等于多少
计算cos45°-cos60°分之sin30°-2sin45°+根号3tan30°
Sin30°=?;Sin45°=?;Sin60°=?;Cos30°=?;Cos45°=?;Cos60°=?;tan30°
求sin^2(44°)+sin^2(46°)+tan53°+tan37°的值
计算下列各式 sin30°*cos30°-(√2)/2 sin45°-cos60°*sin60°
tan37°tan38°tan39°.tan51°tan52°tan53°= 具体解法
sin30°cos60°+cos30°sin60°=
计算10sin60°-6cos30° sin30°+cos60°-cos30°sin45°
2sin30°·cos45°-(sin60°)负二次方+根号3tan30°
计算:sin60°-cos60°+2sin30°cos30° 根号三sin60°-根号2cos45°+根号8的立方