Tìm khẳng định đúng trong các khẳng định sau. tích phân 0->1 sin(1-x)dx

A. $\underset{0}{\overset{1}{\int }}\sin \left(1-x\right)dx=\underset{0}{\overset{1}{\int }}\sin xdx$

B. $\underset{0}{\overset{1}{\int }}co\mathrm{s}\left(1-x\right)dx=\underset{0}{\overset{1}{\int }}\cos xdx$

C. $\underset{0}{\overset{\frac{\pi }{2}}{\int }}\cos \frac{x}{2}dx=\underset{0}{\overset{\frac{\pi }{2}}{\int }}\cos xdx$

D. $\underset{0}{\overset{\frac{\pi }{2}}{\int }}\sin \frac{x}{2}dx=\underset{0}{\overset{\frac{\pi }{2}}{\int }}\sin xdx$