A graph is symmetric with respect to the vertical line corre

A graph is symmetric with respect to the vertical line corresponding to t= pi/2 and r > 0. What does this say about the algebraic symmetry of the function?

A. r(t)=r(pi-t)

B. r(t)=r(-t)

C. r(t)=r(pi/2-t)

D. r(t)=-r(t)

Solution

Symmetrical wrt to vertical line: t=pi/2 and r>0

which above the horizontal axisi.e. 0--- pi rad

So, it means r(t) = r(180 -t) = r(pi -t)

Option A