Question

E(x)= cos x supra 2 + sin x, E(pi pe 3)=radical din 3.

Answer 1

[tex]\it E(x) = cos\dfrac{x}{2} +sinx \\\;\\ \\\;\\ E\left(\dfrac{\pi}{3}\right) = cos\dfrac{\pi}{6} +sin\dfrac{\pi}{3} = \dfrac{\sqrt3}{2} +\dfrac{\sqrt3}{2} =\sqrt3. [/tex]