упростите выражение cos^2 (360-x)+cos^2 (270 + x). Пожалуйста помогите
cos(360-x)=cosx
cos(270+x)=sinx
cos²(360-x)+cos²(270+x)=cos²x+sin²x=1
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cos(360-x)=cosx
cos(270+x)=sinx
cos²(360-x)+cos²(270+x)=cos²x+sin²x=1