(Solved): Differential Equations: Variation of Parameters - Given: (D2+1)y=tan2x Kindly show step by step so ...

Differential Equations: Variation of Parameters - Given: $$\left(D^2+1\right)y={\tan }^{2}x$$ Kindly show step by step solution using variation of parameters with detailed explanations for my review. Answer: $$y=y_c?2+\sin x\ln ?\sec x+\tan x?$$ - Given: (D-1) (D-2) (D-3) y $$=e^x$$ Kindly show step by step solution using variation of parameters with detailed explanations for my review. Answer: $$y=y_c+\frac{1}{2}x{e}^x$$