三角学示例

\cos (a + B) + \cos (a - B)

$\cos (a + B) + \cos (a - B)$

解题步骤 1

\cos (a + B) + \cos (a - B)

$\cos (a + B) + \cos (a - B)$

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

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

三角学 示例