Use the fundamental identities to simplify the expression.
-Find $\tan ( \mathrm { s } - \mathrm { t } )$ given that $\cos \mathrm { s } = - \frac { 5 } { 13 }$, with $\mathrm { s }$ in quadrant II, and $\sin \mathrm { t } = \frac { 8 } { 17 }$, with $\mathrm { t }$ in quadrant II.
A) $- \frac { 220 } { 171 }$
B) $- \frac { 140 } { 171 }$
C) $\frac { 20 } { 3 }$
D) $- \frac { 20 } { 3 }$

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The Answer of Use the fundamental identities to simplify the expression.
-Find $\tan ( \mathrm { s } - \mathrm { t } )$ given that $\cos \mathrm { s } = - \frac { 5 } { 13 }$, with $\mathrm { s }$ in quadrant II, and $\sin \mathrm { t } = \frac { 8 } { 17 }$, with $\mathrm { t }$ in quadrant II.
A) $- \frac { 220 } { 171 }$
B) $- \frac { 140 } { 171 }$
C) $\frac { 20 } { 3 }$
D) $- \frac { 20 } { 3 }$

Use the Fundamental Identities to Simplify the Expression tan⁡(s−t)\tan ( \mathrm { s } - \mathrm { t } )tan(s−t)

Use the Fundamental Identities to Simplify the Expression $\tan ( \mathrm { s } - \mathrm { t } )$