Question

what is the second derivative of y= x/2 - 1/4 sin2x with respect to x?
a. - sin2x
b.-cos2x
c.sin2x
d.cos2x

Answer 1

ignore the first term, since second derivative of a line is 0 just differentiate
\[-\frac{1}{4}\sin(2x)\] twice

Answer 2

first will give you - cosine, second will give you sine
so C
it is always C

Answer 3

ryt 2x cosu = -sin ty ty