REE-May 2010 / Sept. 2016 24. Using power series expansion about 0, find cosx by differentiating from sinx. A.1-(x^2/2!)

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Ree May 2010 Sept 2016 24 Using Power Series Expansion About 0 Find Cosx By Differentiating From Sinx A 1 X 2 2 1 (638.78 KiB) Viewed 34 times

REE-May 2010 / Sept. 2016 24. Using power series expansion about 0, find cosx by differentiating from sinx. A.1-(x^2/2!) + (x^4/4!) - (x^6/6!) + C. 1(x^3/3!) + (x^5/5!) = (x^7/7!) + D. x-(x^3/3!) + (x^5/5!) - (x^7/7!) + ... B. x-(x^2/2!) + (x^4/4!) - (x^6/6!) + REE-Oct. 1997 25. Given the Fourier series in cosine form F(t) = 5 cos 20mt + 2 cos 40mt + cos 80mt. What is the frequency of the fundamental? A. 20 B. 40 C. 10, D. 60 REE-Oct. 1997 26. One term of a Fourier series in series form is 10 cos40mt. Write it in exponential form. A. 5e40mt B. 5ej40mt + 5e-j40mt C. 10e -140mt D. - 10e -j40mt