sin2x^4-cos2x^4的导数是多少

问题描述:

sin2x^4-cos2x^4的导数是多少

(sin2x^4-cos2x^4)'=(sin2x^4)'-(cos2x^4)'=cos2x * 8x^3-[-sin2x * 8x^3]=8x^3 (cos2x+sin2x)