SOLUTION: Show that 12cos^2x-6 = 6cos2x

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Question 707019: Show that 12cos^2x-6 = 6cos2x
Answer by lwsshak3(11628) About Me  (Show Source):
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Show that 12cos^2x-6 = 6cos2x
start with left side:
12cos^2x-6
6(2cos^2x-1)
Identity: cos 2x=2cos^2x-1
6(2cos^2x-1)=6cos2x
verified: left side =right side