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a∫1/sint*dt-a∫sint*dt =a*ln|tan(t/2)|+a*cost+C 不懂
人气:268 ℃ 时间:2020-02-05 00:19:49
解答
a∫1/sint*dt=a∫csc*dt=a*ln|tan(t/2)|+C
-a∫sint*dt=a*cost+C
∫sint*dt,∫csc*dt都是基本的积分,需要记住的
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