What is I=\int^{\pi/2}_{0}\ln(\cosx)dx equal to ? [NDA II 2014]

NDA Math Definite Integrals

For the next two (02) items that follow:
Consider the integral I=

∫

ln(sinx)dx

[NDA II 2014]

Question : 57 of 62

Marks: +1, -0

What is I=

∫

ln(cosx)‌d‌x equal to ?

[NDA II 2014]

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