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1. |
Integrate ( frac{2 cos 2x}{(cos x-sin x)^2} ). |
A. | -log u2061(1+2sin u20612x)+C |
B. | ( frac{1}{4} ) log u2061(1-sin u20612x)+C |
C. | ( frac{1}{4} ) log u2061(1+cos u20612x)+C |
D. | -log u2061(1-sin u20612x)+C |
Answer» E. | |