You DO now that Bitcoin and Bitcoin Cash are two completely different currencies, right?
You can't send BTC to a BCH address and vice versa... you have exchange your BTC on a marketplace for BCH...
Now.. to get access to your wrongly sent BTC you can export the private keys of your recieving-BCH-address
and import it into another BTC wallet. You will be able to spend them from there on.
There are quite a few tutorials online to export your keys from JAXX and to import them keys into another wallet, just google it.
BTC and BCH are different networks/blockchains. If you sent BTC to a BCH address (or the other way around), it's lost forever.
Nonsense.
Same private-/public- keypairs, same transaction history until block 4xx.xxx.
Of course you can recover wrongly sent BTC's, with easily importing the BCH private key into your BTC wallet...