化简sinα^6+cosα^6+3sinα^2cosα^2的结果是

问题描述:

化简sinα^6+cosα^6+3sinα^2cosα^2的结果是

原式=(sin²a+cos²a)(sin^4a-sin²acos²a+cos^4a)+3sin²acos²a=sin^4a-sin²acos²a+cos^4a+3sin²acos²a=sin^4a+2sin²acos²a+cos^4a=(sin²a+cos²...