In this problem, i will lead you through a procedure that allows you to write the function f(x)=(1.5 m) cos(kx - #/3) + (3 m) sin(kx - 7/4) in cosine form. this method can be extended to write the sum of any number of sinusoidal functions of the same spatial frequency as a single cosine function. a) write (1.5 m) cos(kx - 7/3) in quadrature form. b) write (3 m) sin(kx - 7/4) in quadrature form. c) combine the results of a) and b) to write f(x) in quadrature form. d) write the result from c) in cosine form.