数学试题讲解

设

I = \int_{0}^{\frac{π}{4}} \ln (\sin x) d x, J = \int_{0}^{\frac{π}{4}} \ln (\cot x) d x, K = \int_{0}^{\frac{π}{4}} \ln (\cos x) d x

, 则

I, J, K

的大小关系是

I < J < K

. B.

I < K < J

. C.

J < I < K

. D.

K < J < I