三角学示例

$2 \cos^{4} (x) - \cos^{2} (x) - 2 \sin^{2} (x) \cos^{2} (x) + \sin^{2} (x)$

解题步骤 1

$2 \cos^{4} (x) - \cos^{2} (x) - 2 \sin^{2} (x) \cos^{2} (x) + \sin^{2} (x)$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$