Question

I need instant help please

Answer 1

-21/221

Explanation:

`\tan \alpha=12/5 \implies \sin \alpha=-12/13, \cos \alpha=-5/13 \\ \\ \sin \beta=15/17 \implies \cos \beta=8/17 \\ \\ \sin(\alpha-\beta)=\sin \alpha \cos \beta-\cos \alpha \sin \beta \\ \\ =(-12/13)(8/17)-(-5/13)(15/17) \\ \\ =-21/221`