1:已知cos(π/2-x)=根号2*sin(π-y),根号3*cos(-x)=-根号2*cos(π+y)且0<x<π,
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1:已知cos(π/2-x)=根号2*sin(π-y),根号3*cos(-x)=-根号2*cos(π+y)且0<x<π,0<y<π,求x,y
2:已知cos(75°+x)=1/3,其中x为第三象限角,求cos(105°-x)+sin(x-105°)的值
2:已知cos(75°+x)=1/3,其中x为第三象限角,求cos(105°-x)+sin(x-105°)的值
![1:已知cos(π/2-x)=根号2*sin(π-y),根号3*cos(-x)=-根号2*cos(π+y)且0<x<π,](/uploads/image/z/2070555-51-5.jpg?t=1%EF%BC%9A%E5%B7%B2%E7%9F%A5cos%28%CF%80%2F2-x%29%3D%E6%A0%B9%E5%8F%B72%2Asin%28%CF%80-y%29%2C%E6%A0%B9%E5%8F%B73%2Acos%EF%BC%88-x%EF%BC%89%3D-%E6%A0%B9%E5%8F%B72%2Acos%EF%BC%88%CF%80%2By%EF%BC%89%E4%B8%940%EF%BC%9Cx%EF%BC%9C%CF%80%2C)
1,x=π/4,y=π/3或者x=3π/4,y=2π/3
2,(2√2-1)/3
2,(2√2-1)/3
1:已知cos(π/2-x)=根号2*sin(π-y),根号3*cos(-x)=-根号2*cos(π+y)且0<x<π,
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y=sin(-2x+π/6)+根号3cos(2x-π/2)的递增区间
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化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1