Nguyen Quốc Huy
New member
Khai triển Maclaurin của cosx đến x$^{4}$
A. \(1 - \frac{{{x^2}}}{2} + \frac{{{x^4}}}{{24}} + o({x^5})\)
B. \(1 + \frac{{{x^2}}}{2} - \frac{{{x^4}}}{{24}} + o({x^5})\)
C. \(1 - \frac{{{x^2}}}{2} - \frac{{{x^4}}}{{24}} + o({x^5})\)
D. \(1 + \frac{{{x^2}}}{2} + \frac{{{x^4}}}{{24}} + o({x^5})\)
A. \(1 - \frac{{{x^2}}}{2} + \frac{{{x^4}}}{{24}} + o({x^5})\)
B. \(1 + \frac{{{x^2}}}{2} - \frac{{{x^4}}}{{24}} + o({x^5})\)
C. \(1 - \frac{{{x^2}}}{2} - \frac{{{x^4}}}{{24}} + o({x^5})\)
D. \(1 + \frac{{{x^2}}}{2} + \frac{{{x^4}}}{{24}} + o({x^5})\)