Use the properties of inverse trigonometric functions to evaluate the expression. $\tan ( \arctan 40 )$
A) $\tan ^ { - 1 } 40$
B) $- 40$
C) $\frac { \pi } { 40 }$
D) $\tan 40$
E)40

Question

Use the properties of inverse trigonometric functions to evaluate the expression.  $\tan ( \arctan 40 )$  
A) $\tan ^ { - 1 } 40$
B) $- 40$
C) $\frac { \pi } { 40 }$
D) $\tan 40$
E)40

Quizplus · Accepted Answer

The expression $\tan ( \arctan 40 )$ simplifies directly to 40 because the $\tan$ and $\arctan$ functions are inverse operations, canceling each other out.

Use the Properties of Inverse Trigonometric Functions to Evaluate the Expression