plzz plzz plzz plzz ans this que in pic
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2((cos²)² - (sin²)²)
2(1-sin²) - sin^4
2(1-2sin²+sin4-sin4
2(1-sin²-sin²
-2 (-1+cos²+sin²)
-2(-1)
=2
proved!
2(1-sin²) - sin^4
2(1-2sin²+sin4-sin4
2(1-sin²-sin²
-2 (-1+cos²+sin²)
-2(-1)
=2
proved!
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