# How do you calculate tan A= 8.4?

Dec 21, 2016

$A = {83}^{\circ} 21 + K {180}^{\circ}$

#### Explanation:

tan A = 8.4
Calculator gives:
tan A = 8.4 --> $A = {83}^{\circ} 21$
Trig unit circle gives another A that has the same tan value (8.5):
A = 83.21 + 180 = 263^@21
Answers for interval (0, 360):
${83}^{\circ} 21 , {263}^{\circ} 21$
$A = {83}^{\circ} 21 + k {180}^{\circ}$