# What is the derivative of #cos(x-y)=0#?

##### 2 Answers

Sep 17, 2016

#### Explanation:

Given

Sep 17, 2016

#### Explanation:

We can rearrange from the beginning:

#x-y=arccos(0)#

#x-y=pi/2#

#y=x-pi/2#

#dy/dx=1#