Question

what is the general solution of cosx=cosy​

Answer 1

Answer:

Step-by-step explanation:

We have,

$\tt{cos(x)=cos(y)}$

$\sf{\implies\,cos(y)=cos(x)}$

Since period of cosine function is $2\pi$, so,

$\sf{\implies\,y=2n\pi\pm\,x\,\,\,\,\,\,\,\forall\,n\in\mathbb{Z}}$