For 12 weeks course only Mathematical Methods and its ...

cos4x 42 + cos6x 6 + ::: i (c) 2 ˇ 2 hsin2x 2 + sin4x 42 + sin6x 6 + ::: i (d) 8 ˇ 2 hcosx 1 + cos3x 32 + cos5x 5 + ::: i 7. Let the Fourier series expansion of f(x) = xcosx; ˇ x ˇ;f(x+2ˇ) = f(x), be X1 n=1 b n sinnx. Then b 5 equals (a) 4 5 (b) 2 7 (c) 5 12 2 ................
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