# Trigonometry in Algebra 3

Algebra Level 4

$x \sqrt{ \dfrac{(1+y^2)(1+z^2)}{1+x^2}} + y \sqrt{ \dfrac{(1+z^2)(1+x^2)}{1+y^2}} + z \sqrt{ \dfrac{(1+x^2)(1+y^2)}{1+z^2}}$

Given that $$x,y$$ and $$z$$ are positive reals satisfying $$xy + xz + yz = 1$$, evaluate the expression above.

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