![\int\limits^\frac{\pi}{6} _0 {[7cos(2x)-(7-7cos(2x))]} \, dx + \int\limits^\frac{\pi}{2} _\frac{\pi}{6} {[(7-7cos(2x))-7cos(2x)]} \, dx](/tpl/images/0745/1255/2cffc.png)
![\int\limits^\frac{\pi}{6} _0 {[7cos(2x)-7+7cos(2x))]} \, dx + \int\limits^\frac{\pi}{2} _\frac{\pi}{6} {[7-7cos(2x)-7cos(2x)]} \, dx](/tpl/images/0745/1255/85a9a.png)
![\int\limits^\frac{\pi}{6} _0 {[14cos(2x)-7]} \, dx + \int\limits^\frac{\pi}{2} _\frac{\pi}{6} {[7-14cos(2x)]} \, dx](/tpl/images/0745/1255/2b29c.png)
![[7sin(2x)-7x]|^\frac{\pi}{6} _0 + [7x-7sin(2x)]|^\frac{\pi}{2} _\frac{\pi}{6}](/tpl/images/0745/1255/2d7c9.png)
![[7sin(\frac{\pi }{3} )-\frac{7\pi }{6} ] - [7sin(0)-0 ] + [\frac{7\pi }{2} -7sin(\pi )] - [\frac{7\pi }{6} -7sin(\frac{\pi }{3} )]](/tpl/images/0745/1255/b83c8.png)
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