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4×Cos2π/7×cosπ/7 -1 = 2×cosπ/7 prove this plz Do it by changing terms of the left side only

4×Cos2π/7×cosπ/7 -1 = 2×cosπ/7 prove this plz
Do it by changing terms of the left side only

Grade:12th pass

1 Answers

Arun
25763 Points
2 years ago
Dear student
 
Your question is wrong. Please check and repost it. You can also attach an image. I will be happy to help you.

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