![[\text{cos}^2(\frac{\theta}{6})-\text{sin}^2(\frac{\theta}{6})][\text{cos}^2(\frac{\theta}{6})+\text{sin}^2(\frac{\theta}{6})]](/tpl/images/0994/7869/6b0d8.png)
](/tpl/images/0994/7869/82b01.png)
[Since, cos²a + sin²a = 1]
[Identity used → cos²a - sin²a = cos(2a)]Can anyone help me with any one of these questions please
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