Question

Find the derivative of s=cos(1-2t)

Answer 1

chain rule:

ds/dt = [ -sin(1-2t) ][ -2 ]

Answer 2

Using the power rule you find that s(t)=-sin(1-2t)*(-2) since the power rule is simply d/dx(f(g(x)) = f'(g(x))*g'(x)

Answer 3

thats the chain rule

Answer 4

why are you using power rule?..

Answer 5

My bad, chain rule lol.