cos^4A - sin^4A + 1 = 2cos^2 AProve this
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HEY DEAR HERE IS YOUR ANSWER ✌ ✌❤ ❤
➡ Cos^4A-sin^4A=(cos^2A-sin^2A)(cos^2A+sin^2A)=2cos^2A
HOPE IT HELPS U.✨✨
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THANKS.❤❤
➡ Cos^4A-sin^4A=(cos^2A-sin^2A)(cos^2A+sin^2A)=2cos^2A
HOPE IT HELPS U.✨✨
# BE BRAINLY.✌✌
THANKS.❤❤
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