A point has rectangular coordinates $(10, -18, 35)$ and spherical coordinates $(\rho, \theta, \phi).$  Find $\tan \theta.$
Question:
A point has rectangular coordinates $(10, -18, 35)$ and spherical coordinates $(\rho, \theta, \phi).$  Find $\tan \theta.$
Answer:
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-\frac{9}{5}
A point has rectangular coordinates $(10, -18, 35)$ and spherical coordinates $(\rho, \theta, \phi).$  Find $\tan \theta.$
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