sin7°cos37°－sin83°cos307°=

sin7°cos37°－sin83°cos307°= sin7°cos37°－sin83°cos307° 求过程! sin7°cos37°—sin83°cos53°的值是?谢谢 sin7°cos37°-sin83°sin37°的值是多少?3Q sin7°cos37°-sin83°cos307°化简求值 求详细过程 sin37°cos83°+cos37°sin83° sin37ºsin7º+cos37ºsin83º= 为什么sin83°=cos7° sin7°27′是多少 cos37°=? 求cos8°-sin7°×sin15°分之sin8°+sin7°cos15°的值 (Sin7°+cos15°sin8°)÷(cos7°－sin15°sin8°)=?(sin7+cos15sin8)/(cos7-sin15sin8) 积化和差 =[sin7+(sin23-sin7)*0.5]/[cos7+(cos23-cos7)*0.5] =(0.5sin7+0.5cos23)/(0.5cos7+0.5cos23) 约分,和差化积 =(sin15*sin8)/(cos15*cos8) 约分 =tan15 半 cos83°·cos23°+sin83°·sin23°= cos37° 等于cos多少π cos7°cos23°-sin7°sin23°=? sin7°3′7〃的值 关于三角函数的计算题(sin8°+sin7°cos15°)÷(cos8°-sin7°sin15°)=? 求（sin8°+sin7°cos15°）/（cos8°-sin7°sin15°）的值