SOLUTION: Find the exact value of y=arccos(tan7pi/4)?

Algebra ->  Trigonometry-basics -> SOLUTION: Find the exact value of y=arccos(tan7pi/4)?      Log On


   

Question 436367: Find the exact value of y=arccos(tan7pi/4)?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the exact value of y=arccos(tan7pi/4)?
-----
1st: tan(7pi/4) = -1
---------------------------
2nd: arccos(-1) = 3.1416..
===============================
Cheers,
Stan H.