∫(π/2 0)sin(x+π/2)dx=?A.-2 B.-1 C.1 D.2
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∫(π/20)sin(x+π/2)dx=?A.-2B.-1C.1D.2∫(π/20)sin(x+π/2)dx=?A.-2B.-1C.1D.2∫(π/20)sin(x+π/2)dx=?A.-2B.-1C
∫(π/2 0)sin(x+π/2)dx=?A.-2 B.-1 C.1 D.2
∫(π/2 0)sin(x+π/2)dx=?A.-2 B.-1 C.1 D.2
∫(π/2 0)sin(x+π/2)dx=?A.-2 B.-1 C.1 D.2
∫ sin(x+π/2) dx
=∫ cosx dx
= sinx
那么代入上下限π/2和0
得到
原积分= 1- 0=1
选择C
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