Given that y = ((4x+3)^5)(sin2x), find dy/dx

First of all, we have to use the product rule, since two things are multiplied together.  The product rule states that d/dx (u*v) = vu' + uv'

Let u = (4x+3)5  v = sin(2x)

Now, to find  u' and v' we have to find du/dx and dv/dx. As we see, we need to use the chain rule to find du/dx

u' = 20(4x+3)4   v' = 2cos(2x)

Finally, dy/dx = vu' + uv' = 20sin(2x)(4x+3)4 + 2cos(2x)(4x+3)5

JN

Related Maths A Level answers

All answers ▸

Prove the identity: (sinx - tanx)(cosx - cotx) = (sinx - 1)(cosx - 1)


A ball is fired from a cannon at 20m/s at an angle of 56degrees to the horizontal. Calculate the horizontal distance the ball travels as well as its maximum height reached.


Let f(x)=x^3 - 2x^2 + 5. For which value(s) of x does f(x)=5?


Sketch the graph y=Ax^2 where A is a constant