fraccot{theta}csc{theta} = costheta

常见问题解答

• $\text{求解 }\theta$ $\frac{\cot \theta }{\csc \theta }=\cos \theta$

  

  $$\theta \ne k\pi ,k\in \mathbb{Z}$$

• 核实 $\frac{\cot \theta }{\csc \theta }=\cos \theta$

  

  $$\text{为真}$$