\({\tan ^{ - 1}}\left( {\frac{{\rm{b}}}{{\rm{a}}}} \right)\)

\({\tan ^{ - 1}}\left( {\frac{{\rm{a}}}{{\rm{b}}}} \right)\)

\({\tan ^{ - 1}}\left( {\frac{{{\rm{a}} + {\rm{b}}}}{{{\rm{a}} - {\rm{b}}}}} \right)\)

\({\tan ^{ - 1}}\left( {\frac{{{\rm{a}} - {\rm{b}}}}{{{\rm{a}} + {\rm{b}}}}} \right)\)

What is α equal to?

1.	What is α equal to?
A.	\({\tan ^{ - 1}}\left( {\frac{{\rm{a}}}{{\rm{b}}}} \right)\)
B.	\({\tan ^{ - 1}}\left( {\frac{{\rm{b}}}{{\rm{a}}}} \right)\)
C.	\({\tan ^{ - 1}}\left( {\frac{{{\rm{a}} + {\rm{b}}}}{{{\rm{a}} - {\rm{b}}}}} \right)\)
D.	\({\tan ^{ - 1}}\left( {\frac{{{\rm{a}} - {\rm{b}}}}{{{\rm{a}} + {\rm{b}}}}} \right)\)
Answer» B. \({\tan ^{ - 1}}\left( {\frac{{\rm{b}}}{{\rm{a}}}} \right)\)

Discussion