y=A cos nx+B sin x

If y=A cos nx+B sin nx, show that(d^(2)y)/(dx^(2))+n^(2)y=0

If y=A cos nx+B sin nx, show that (d^(2)y)/(dx^(2))+n^(2)y=0

cos mx = sin nx

If y = e ^(-kx //2) (a cos nx + b sin nx) then y _(2)+ky_(1)+ (n^(2) + k^(2) //4)y =

cos x + cos2x + ... + cos nx = sin ((nx) / (2)) cos ec ((x) / (2)) cos (((n + 1) x) / (2))

y=a cos x+b sin x+x sin x is a solution of the D.E. A) y_(2)+y=x cos x B) y_(2)+2y=2cos x C) y_(2)+y=2cos x D) y_(2)-y=2cos x

Find the second order derivative of the following functions y = A cos n x + B sin nx, Prove that (d^2y)/(dx^2) + n^2 y = 0

Verify that the function y=a cos x + b sin x is a solution of the differential equation cos x(dy)/(dx)+y sin x =b

If y=e^(-x)(A cos x + B sin x) then y is a situation of

If y=e^(-x)(A cos x + B sin x) then y is a solution of