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Show that : cos 60^(@)=2cos^(2)30^(@)-1...

Show that : `cos 60^(@)=2cos^(2)30^(@)-1`

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To show that \( \cos 60^\circ = 2 \cos^2 30^\circ - 1 \), we will calculate both sides of the equation and verify if they are equal. ### Step 1: Calculate the Left-Hand Side (LHS) We start with the left-hand side: \[ \text{LHS} = \cos 60^\circ \] We know from trigonometric values that: ...
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