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6 tan 2 x – 2 cos 2 x = cos2x if cos2x = ? 6 tan2 x – 2 cos2 x = cos2x if cos2x = ?
6 tan2 x – 2 cos2 x = cos2x if cos2x = ?
How can you ask the value of cos2x as it is always= cos^(2)x - sin^(2)x??
Its answer is cos2x = 1/2
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