# Solve a Trigonometric Equation!

Geometry Level 4

$\large 2^{1+3\cos x} - 10 \cdot 2^{-1+2\cos x} + 2^{2+\cos x} - 1 = 0$

If $$x$$ in the interval $$0 \leq x < 2 \pi$$, find the sum of all possible values of $$x$$ satisfying the equation above.