Write a cosine function that has a midline of 5, an amplitude of 3 and a period of 4/3

Draw the line of reflection that reflects △abc onto triangle δ a'b'c'

With finding limits of multi variable !

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis