求,不定积分.∫上限兀/2 下限0(cosx/2-sinx/2)dx+∫上限 兀下限 兀/2(sinx/2-cosx/2)dx
问题描述:
求,不定积分.∫上限兀/2 下限0(cosx/2-sinx/2)dx+∫上限 兀下限 兀/2(sinx/2-cosx/2)dx
答
∫(0,兀/2)(cosx/2-sinx/2)dx+∫(兀/2.兀)(sinx/2-cosx/2)dx=2[∫(0,兀/2)(cosx/2-sinx/2)dx/2+∫(兀/2.兀)(sinx/2-cosx/2)dx/2 ]=2(sinx/2+cosx/2)|(0,兀/2)-2(sinx/2+cosx/2)|(兀/2.兀)=2(√2-1)-2(1-√2)...