The following diagram shows the curve of a trigonometric function.
The quadratic equation has two distinct real solutions.
The following diagram shows the curve y=a sin (k(x-d))+c where a,k,d and c are all positive constants. The curve has a minimum point at (2.5, 2) and a maximum point at (4, 8) .
(a). Write down the value of a
and the value of c.
(b). Find the value of k.
π3
2π3
π2
3π2
(c). Find the smallest possible value of d, given d>0.