mashiqi

摘要：【转载请注明出处】http://www.cnblogs.com/mashiqi 2017/03/30 1、三角函数n次方的定积分值 令$I_n = \int_0^{\pi/2} \sin^n(x) \,\mathrm{d}x = \int_0^{\pi/2} \cos^n(x) \,\mathrm{ 阅读全文