# Math Help - Derivative

1. ## Derivative

Is this right for the derivative of arcsin(2x)?

= 1/√(1 - 4x²)

2. Originally Posted by offahengaway and chips
Is this right for the derivative of arcsin(2x)?

= 1/√(1 - 4x²)
missing a "2" in the numerator (derivative of 2x)

3. thanks

4. ## Another differentiation problem

is the differential of √(1 - 4x²)

=1/2(1 - 4x²)^-1/2

5. hello
you've forgotten the differential of $1-4x^{2}$

6. Which is -8x?

7. While im here can this be simplified?

arcsin(2x)1/2(-8x)^-1/2

8. hello
you mean this : $\frac{asin\left( 2\,x\right) }{4\,\sqrt{2}\,\sqrt{-x}}$ $?$

9. i mean this

arcsin(2x)[1/2(-8x)^-1/2]

can the above be simplified?

10. try to expand what is in $[$ $]$,you'll have the same result,and it's already simplified.
(or probably i went wrong)

11. thanks