- #1

thomas49th

- 655

- 0

## Homework Statement

x = 5sin(2y +6) find dy in terms of x

## Homework Equations

## The Attempt at a Solution

dx/dy = 8 cos (2y+6)

dy/dx = 1 / (8cos(2y+6)

but according to the mark scheme the final answer is

+ or - 1 / (2 sqrt[16/x^2])

i don't see how on Earth they got there :O

Can anyone? Thanks :)