结束上页 下页结束例 5 y?sec x? 求 y
解 x xxxxy 2c os )( c os1c os)1()c os1()( s e c
xx2cossinsec x tan x?
即 (sec x)sec x tan x?
解解 x xxxxy 2c os )( c os1c os)1()c os1()( s e c
xx2o ss in s ec x tan x?
余切及余割函数的导数?
(cot x)csc2x? (csc x)csc x cot x?