sec平方x求导等于多少

Question

sec平方x求导等于多少

Answer 1

(sec²x)′
=2secx(secx)′ 利用复合函数求导
=2secx*(secxtanx)
=2sec^2 x*tanx

Answer 2

(sec²x)′
=2secx(secx)′
=2secx(secxtanx)
=2sec²xtanx

Answer 3

2*(secx)的平方*（tanx）本回答被提问者采纳