# 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.