1/(1 cost)的不定积分怎么求
问题描述:
1/(1 cost)的不定积分怎么求
答
是∫ 1/(1+cost) dt?
=∫ (1-cost)/[(1+cost)(1-cost)] dt
=∫ (1-cost)/sin²t dt
=∫csc²t dt-∫csctcott dt
=-cott-(-csct)+C
=csct-cott+C