2 x² (+) = 2x²x² + x₁x² ² X2(t) = x, SIN(X2) + X₂ cos(x₁) Find the Jacobian of the system

Find a system of two equations in two variables, x1 and x2, that has the solution set given by the parametric representation x1=t and x2=3t4, where t is any real number. Then show that the solutions to the system can also be written as x1=43+t3 and x2=t.

Cos2x+cos6x=2cos4xcosx

4sinx •cotx / cos2x + 1