Questions asked by Firyal

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• How to prove #sin(4x) = 8 (cos^3)x sin x − 4 cos x sin x#?
  
• How to prove #sin(4x) = 8 (cos^3)x sin x − 4 cos x sin x#? With sin(4x) = Im(e^(i4x))
  
• How to solve the following inhomogeneous differential equation? under the initial condition y (0) = y0. Let λ and μ be positive real parameters.
  
• How do I solve the nonlinear differential equation #y′ = −x/y# under initial condition #y(1) = 1#?
  
• How do I calculate the Real and Imaginary Parts of this equation?
  
• How do I determine the parameter a of the following equation such that f(x, y) has an extremum at a point (x, y) with x = -3, and show that it is a minimum?
  
• How do you integrate the following Integral?
  
• How do I solve this differential equation?
  
• How do I solve this integral? This is the center of gravity of a cone.
  
• How do I solve this differential equation?
  
• What is the Fourierseries of the following equation?