求定积分(sinx)^5(cosx)^5dx 积分区间0到派 PS答案说是16/105

问题描述:

求定积分(sinx)^5(cosx)^5dx 积分区间0到派 PS答案说是16/105

∫(sinx)^5(cosx)^5dx =∫(sinx)^5(cosx)^4d(sinx)=∫(sinx)^5[1-(sinx)^2]^2d(sinx)=∫(sinx)^5d(sinx)-2∫(sinx)^7d(sinx)+∫(sinx)^9d(sinx)=(sinx)^6/6-(sinx)^8/4+(sinx)^10/10=[(sinx)^6/6-(sinx)^8/4+(sinx)^...