Tính tích phân sau:
a. \int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (sin x)b. \int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (cos x)c. \int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (tan x)d. \int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (cot x)
Tính tích phân sau:
a.
$\int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (sin x)
$b.
$\int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (cos x)
$c.
$\int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (tan x)
$d.
$\int\limits_{\frac{\pi }{4}}^{\frac{\pi }{3}} \ln (cot x)
$