cos58°sin37°+sin122°sin53°求解,写清过程···

cos58°sin37°+sin122°sin53°求解,写清过程··· sin50°sin37°+sin122°sin53°=? cos58度sin37度+sin122度sin53度=? cos58度sin37度+sin122度sin53度=? sin58°cos37°-cos58°sin37° 化简cos24°cos36°－cos66°cos54°cos58°sin37°+sin122°sin53°cos(π／3＋θ)＋cos(π／3－θ)cos(α－β)cos(α＋β)＋sin(α－β)sin(α＋β) sin37°等于多少? 利用两角和（差）大的余弦公式化简cos58°cos37°+sin58°sin37°cos(60°+)－cos(60°－θ)cos(60°＋θ)＋cos(60°－θ) ﹣sin347°×cos32°×cos58°×sin77°＝ sin347°cos148°+sin77°cos58°化简 sin347°cos148°＋sin77°cos58° cos13°cos58°+sin13°sin58°怎么算 sin347°cos148°+sin77°cos58°怎么算? Cos32°Cos28°-Cos58°Cos62° 化简cos58°cos37°+cos32°cos53° sin37° 和tan37°哪个大... sin347°cos148°＋sin77°cos58°等于多少,要具体过程,谢谢 求sin347°cos148°+sin77°cos58°的值