cos45°sin²30°+2分之根号2sin²60°..
2个回答
cos45°sin²30°+2分之根号2sin²60°
=√2/2×1/4+√2/2 ×3/4
=√2/2×(1/4+3/4)
=√2/2×1
=√2/2
相关问题
初三锐角三角函数计算题sin45°+2分之根号2=? 1+2sin30°cos30°=? sin45°*cos60°+s
1.cos30°-sin45°/sin60°-cos45° 2.(sin30^2)30°+2sin60°+tha45°-
2sin45°-1/根号2-1+sin30°+cos60°
cos60°+tan60° 2/根号2sin45°+sin60°-2cos45°
cos45°•tan45°+ 根号3.tan30°-2cos60°•sin45°
(1)cos60°-sin^2 45°+sin^2 45°+1/4tan^2 30°+cos30°-sin30°
sin30°-二分之根号2cos45°+三分之一
cos60-sin^(2)45+tan^(2)30+cos^(2)30-sin30=
sin30°/(cos45°—cos60°)—2cos45°+根号3tan30°等于多少?
(1)sin60°-tan45°; (2)cos60°+tan60°; (3)根号2 /2 sin45°+sin60°-