Nguyên hàm \(\int {{{{x^2}{\mathop{\rm s}\nolimits} {\rm{inx}}} \over {{\rm{co}}{{\rm{s}}^3}x}}d{\rm{x}}} \) bằng?
A.\({{{x^2}} \over {2{{\cos }^2}x}} - x\tan x + \ln \left| {\cos x} \right| + C\)
B.\({{{x^2}} \over {2{{\cos }^2}x}} + x\tan x - \ln \left| {\cos x} \right| + C\)
C.\({{{x^2}} \over {2{{\cos }^2}x}} - x\tan x - \ln \left| {\cos x} \right| + C\)
D.\({{{x^2}} \over {2{{\cos }^2}x}} + x\tan x + \ln \left| {\cos x} \right| + C\)
A.\({{{x^2}} \over {2{{\cos }^2}x}} - x\tan x + \ln \left| {\cos x} \right| + C\)
B.\({{{x^2}} \over {2{{\cos }^2}x}} + x\tan x - \ln \left| {\cos x} \right| + C\)
C.\({{{x^2}} \over {2{{\cos }^2}x}} - x\tan x - \ln \left| {\cos x} \right| + C\)
D.\({{{x^2}} \over {2{{\cos }^2}x}} + x\tan x + \ln \left| {\cos x} \right| + C\)
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Hóa Học lớp 12
