In △ABC the points M and N belong to the sides

AC

and

AB

respectively.

AM= 1 3 AC, AN= 1 3 AB, BC=15. Find MN.

there is no picture in order for this question to be answered

since no one answered yet i will give it a shot, not completely sure tho.

i think it should be y=cos(x+2pi), (third answer, answer c)

good luck.

y - 25 = 2 ( x - 10 ) should be the answer