questions regarding voltic bicorn and lightning tricorn

DREV-JP041
Voltech Bicorn 「ボルテック・バイコーン」
LIGHT/Beast - Synchro - Effect/7/2500/2000
1 Beast-Type Tuner + 1 or more non-Tuner monsters
If this card is destroyed by your opponent, both players send the top 7 cards of their Decks to the Graveyard.

DREV-JP042
Lightning Tricorn 「ライトニング・トライコーン」
LIGHT/Beast - Synchro - Effect/8/2800/2000
1 Tuner + 1 or more non-Tuner Beast-Type monsters
If this card is destroyed by your opponent, you can select 1 "Thunder Unicorn" or "Voltech Bicorn" in your Graveyard and Special Summon it.

can i activate their effects if they are destroyed by battle?

erm.... yes

ok, thks for ur help.