SOLUTION: Having trouble understanding inverse trig functions / calculating exact values.... Sec^-1 (2.2500)=

Algebra ->  Trigonometry-basics -> SOLUTION: Having trouble understanding inverse trig functions / calculating exact values.... Sec^-1 (2.2500)=      Log On


   

Question 330363: Having trouble understanding inverse trig functions / calculating exact values....
Sec^-1 (2.2500)=
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
What sort of trouble?
-----------
Sec^-1 (2.2500)=
secant = 1/cosine
--> arccos(1/2.25) = arccos(4/9)
Calculators have sine, cosine and tangent
arcsec(2.25) =~ 63.6 degs