Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If 
then prove that 4x 2 + y 2 – 4xy cos α = 4 sin 2 α
Text Solution
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⇒ 4x 2 + y 2 – 4xy cos α = 4 – 4cos 2 α
⇒ 4x 2 + y 2 –4xy cos α = 4 sin 2 α
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