Question

If f( x, y, z) = ( cosx,siny,tanz ) and g(x, y, z) = ( x - 3, y² -1, z² - 1 ), then find fog.

Answer 1

f (g (x))={cos (x-3), sin (y^2-1), tan (z^2-1)}

actually you can solve this f (g (x))=fog
means put g (x) in place of x