Trigonometry 7th Edition

$\tan 143.4^{\circ}$ = - 0.7427
Using calculator in degree mode- 143.4 → $\tan$ $\tan 143.4^{\circ}$ = - 0.7426655415 Rounding it to four places past the decimal point- $\tan 143.4^{\circ}$ = - 0.7427