sin(30°+x)-sin(30°-x)用和(差)角公式化简 怎么算的
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sin(30°+x)-sin(30°-x)用和(差)角公式化简 怎么算的
sin(30°+x)-sin(30°-x)
用和(差)角公式化简
怎么算的
sin(30°+x)-sin(30°-x)用和(差)角公式化简 怎么算的
sin(a) + sin(b) = 2 * sin((a+b)/2) * cos((a-b)/2)
=> sin(30+x) - sin(30-x)
= sin(30+x) + sin(x-30)
= 2 * sin(x) * cos(30)
= 2 * sin(x) * (3/4)^(1/2)
sin(30°+x)-sin(30°-x)等于多少?
已知sin(x+30°)=2sin(x-30°),则tanx=( )
函数y=3sin(x+30°)+5sin(x+90°)的最大值为
cos(27°+x)sin(57°+x)-sin(207°+x)sin(327°+x)
sin(x-30)cos30=?
高一三角函数化简 sin^2(x-30)+sin^2(x+30)-sin^2(x)
sin(x+30°)=0.6 Sinx=
sin(30°+x)-sin(30°-x)用和(差)角公式化简 怎么算的
已知sin(x+30°)=2sin(x-30°),则tanx=( ) 请求详解
已知sin(x+30°)=2sin(x-30°),则tanx=( ) 请求详解
sin x
求f(x)=sin^2(x+30°)+sin(x+30°)*cos(x+30°)的单调递减区间
sin(33°-x)cos(27°+x)+cos(33°-x)sin(27°+x)
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
sin(45-3x)*cos(60-3x)-cos(30+3x)*sin(45+3x) ?
sin(45-3x)*cos(60-3x)-cos(30+3x)*sin(45+3x)
sin(sin(x))的奇偶性
sin[(x 30)-30]怎么算?