Solve this:If f(x) = x-x3 and ϕ(x) = sin 2x, find fϕ π12 - Maths - Relations and Functions

Question

S o l v e   t h i s : I f   f ( x )   =   x - x
3   a n d   ϕ ( x )   =   sin   2 x ,
  f i n d   f ϕ   π 12

Anuradha Sharma · Accepted Answer

Hi,
fx= x-x3ϕx= sin2xnow fϕπ12now ϕπ12= sin2×π12= sinπ6= 12now  fϕπ12= f12=12-123= 12-18= 4-18= 38

Regards

S o l v e t h i s : I f f ( x ) = x - x 3 a n d ϕ ( x ) = sin 2 x , f i n d f ϕ π 12