∫1/1+cost dt

∫dt/(1+cost) ∫1/1+cost dt ∫dt/(1+sint+cost) 求积分 ∫ [ 1 / (cost)^3 ]dt 请教高手一道不定积分：∫√(1+cost^2)dt 求定积分∫（-π/2,0) cost/根号下（1+cost)dt a∫1/sint*dt-a∫sint*dt =a*ln|tan(t/2)|+a*cost+C ∫sint/(cost+sint)dt ∫cost/(sint^2) dt =∫dsint/sint^2 =-1/sint + C 求极限 lim→+0 ∫(√x,0) ((1-cost^2)dt)/(x^(5/2)) 一道积分题求助(t-sint)√(1-cost) dt 1.a∫1/sint*dt-a∫sint*dt =a*ln|tan(t/2)|+a*cost+C 不懂 2.求一下不定积