Sin4xcos2x = (1/2)cos2 x - (1/2)cos6 x
(1/2)sin6 x + (1/2)sin2 x
(1/2)sin6 x - (1/2)sin2 x
(1/2)cos2 x + (1/2)cos6 x

the answer is a

step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

16

step-by-step explanation:

answer is because 4×10=40

and 98×4= is 392

40,392