Remember that cos is just a translation of sin and vice versa.
So:
Sin(x) = Cos(90 - x)
Cos(x) = Sin(90 - x)
Therefore, to answer your question:
Cos(19) = Sin(90 - 19)
= Sin(71)
What do you mean is there an image
Only numbers possible would be five and zero
Answer
Factor 13 out of 26x+13
= 13( 2x+1)