三角学示例

$\cos^{2} (a) - \sin^{2} (a) = \frac{2 \cos^{2} (a) \cdot \tan (a)}{\tan (2 a)}$

解题步骤 1

对方程两边进行作图。

$y = \cos^{2} (a) - \sin^{2} (a)$

$y = \frac{2 \cos^{2} (a) \cdot \tan (a)}{\tan (2 a)}$

解题步骤 2

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