Tính nguyên hàm \(I = \int {{{{{\cos }^2}x} \over {{{\sin }^8}x}}dx} \) ?
A.\(I = {{{{\cot }^7}x} \over 7} + {{2{{\cot }^5}x} \over 5} + {{co{t^3}x} \over 3} + C\)
B.\(I = {{{{\cot }^7}x} \over 7} - {{2{{\cot }^5}x} \over 5} + {{co{t^3}x} \over 3} + C\)
C.\(I = - {{{{\cot }^7}x} \over 7} - {{2{{\cot }^5}x} \over 5} - {{co{t^3}x} \over 3} + C\)
D.\(I = - {{{{\cot }^7}x} \over 7} + {{2{{\cot }^5}x} \over 5} - {{co{t^3}x} \over 3} + C\)
A.\(I = {{{{\cot }^7}x} \over 7} + {{2{{\cot }^5}x} \over 5} + {{co{t^3}x} \over 3} + C\)
B.\(I = {{{{\cot }^7}x} \over 7} - {{2{{\cot }^5}x} \over 5} + {{co{t^3}x} \over 3} + C\)
C.\(I = - {{{{\cot }^7}x} \over 7} - {{2{{\cot }^5}x} \over 5} - {{co{t^3}x} \over 3} + C\)
D.\(I = - {{{{\cot }^7}x} \over 7} + {{2{{\cot }^5}x} \over 5} - {{co{t^3}x} \over 3} + C\)
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Hóa Học lớp 12
