Question

对(tanx)(secx)^2求积分,我算出2个结果,一个是1/2(tanx)^2,一个是1/2(secx)^2；这两个

Answer 1

(1/2)(tanx)^2 +C1

=1/2((secx)^2-1) +C1

= (1/2)(secx)^2 +(C1-1/2)

= (1/2)(secx)^2 + C2

两个结果都对