Relations Question 25

Question: If $ f(x)={{\sin }^{2}}x+{{\sin }^{2}}( x+\frac{\pi }{3} )+\cos x\cos ( x+\frac{\pi }{3} ) $ and $ g( \frac{5}{4} )=1, $ then $ (gof),(x)= $

Solution:

Answer: 1