I=∫cos5xsinxdxI=∫cos5xsinxdx
Đặt cosx=u⇒−sinxdx=du⇒sinxdx=−ducosx=u⇒-sinxdx=du⇒sinxdx=-du
I=−∫t5du=−t66+C=−cos6x6+CI=-∫t5du=-t66+C=-cos6x6+C
∫cos5xsinxdx"" class="MathJax_CHTML mjx-chtml">I=∫cos5xsinxdxI=∫cos5xsinxdx
Đặt u⇒-sinxdx=du⇒sinxdx=-du"" class="MathJax_CHTML mjx-chtml">cosx=u⇒−sinxdx=du⇒sinxdx=−ducosx=u⇒-sinxdx=du⇒sinxdx=-du
-∫t5du=-t66+C=-cos6x6+C"" class="MathJax_CHTML mjx-chtml">I=−∫t5du=−t66+C=−cos6x6+CI=-∫t5du=-t66+C=-cos6x6+C