sin(π/2-x)=cos(π/2-x) 正确吗?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/08 05:40:51
sin(π/2-x)=cos(π/2-x) 正确吗?
![sin(π/2-x)=cos(π/2-x) 正确吗?](/uploads/image/z/17637775-7-5.jpg?t=sin%28%CF%80%2F2-x%29%3Dcos%28%CF%80%2F2-x%29+%E6%AD%A3%E7%A1%AE%E5%90%97%3F)
错 再答: 左边=cosx
再答: 右边=sinx
再答: 右边=sinx
已知函数f(x)=cos(2x-π/3)+sin^2 x-cos^2 x
已知函数f(x)=cos(2x-π\3)+sin²x-cos²x
sin(x+1/2π)=cosx?还是cos-x
已知函数f(x)= [sin(2π-x)sin(π+x)cos(-x-π)] /[2cos(π-x)sin(3π-x)]
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
化简:2cos2x+2sin^2 x+cos(-x)分之sin2x+sin(π-x)=___________
f(x)=2cos*sin(x+π/3)-^3sin^2x+sinx*cosx
已知cos(π/2+x)=sin(x-π/2) 求sin^3(π-x)+cos(x+π)/5cos(5π/2-x)+3s
已知(x)=[sin(π-x)cos(2π-x)tan(-x+π)]/[cos(-π/2+x)]
证明下列恒等式: (1)2sin(2/π+x)cos(2/π-x)*cosθ+(2cos^2x-1)*sinθ=sin(
已知f(x) =sin^2 x +2sinx cos x + 3 cos^2 x ,x∈(0 ,π) .
已知f(x)=cos^2x+sinxcosx g(x)=2sin(x+π/4)sin(x-π/4)