sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度)

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sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度)sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度)sin(负1071度)乘sin99度加s

sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度)
sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度)

sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度)
sin(-1071°)sin99°+ sin(-171°)sin(-261°)
= (-sin351°)sin99° + sin(171°)sin(261°)
= -sin9°sin81°+sin9°sin81°
=0

0

sin(负1071度)乘sin99度加sin(负171度)乘sin(负261度) sin(-1071度)×sin99度+sin(-171度)sin(-261度)化简 化简(1)sin(-1071度).sin99度+sin(-171度).sin(-261度) sin(-1071)×sin99+sin(-171)×sin(-261)等于? sin(-351度)sin99度+sin171度sin261度= 化简 sin(-1070·)*sin99·+sin(-171·)*sin(-261·)1+sin(a-2x)*sin(x*a)-2cos^2(-a)谁有新课标数学必修四的答案、我很需要..如上面的-1071·是负1070度. 高一三角函数习题,用诱导公式求下列三角函数值.第一题cos(-17π/4) 第二题cos(-1751度36分) 第三题cos1615度8分 第四题sin(-26π/3) 化简题:第一题sin(-1071度)乘以sin99度加上sin(-171度)乘 高一数学化简sin(-1071°)*sin99°+sin(-171°)*sin(-261°) 化简sin(—1071°)乘以sin99°+sin(—171°)乘以sin(—261°)鄙人数学不好,请指教 sin(-1071°)×sin99°+sin(-171°)×sin(-261°) 化简等于多少 sin(-1071°)*sin99°+sin(-171°)*sin(--261°) 三角函数诱导公式化简2题.sin(-1071°)×sin99°+sin(-171°)×sin(-261°)1+sin(α-2π)×sin(π-α)-2cos^2(-α) 化简,①sin(-1071°)×sin99°+sin(-171°)×sin(261°)②1+sin(α-2π)×sin(π+α)-2cos2(-α) 化简:sin(-1071°)*sin99°+sin(-171°)*sin(-261°)+tan1089°*tan(-540°)RT sin60度乘cos30度加(负2)负1平方根减tan45度是多少?急用, (负56)除(负12加8)加(负2)乘5 (负17)乘43加(负17)乘21减(负17)乘164 78乘(负5分之3)加(负11)乘(负5分之3)加(负33)乘5分之3