SOLUTION: I have been ill and have missed several weeks of school. I am trying to catch up now that I am home from the hospital via email. My pre-cal/trig teacher sent me several homework as
Algebra ->
Formulas
-> SOLUTION: I have been ill and have missed several weeks of school. I am trying to catch up now that I am home from the hospital via email. My pre-cal/trig teacher sent me several homework as
Log On
Question 836440: I have been ill and have missed several weeks of school. I am trying to catch up now that I am home from the hospital via email. My pre-cal/trig teacher sent me several homework assignments, but I am so behind that I do not now how to do these problems. Can you help with this one and maybe I can use it as an example? I am supposed o evaluate using principle values of the inverse relations.
The problem: cos(2 arc cos 5/6)
Thank you so much!!! Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! begin by evaluating arccos(5/6) which is 33.557 degrees
now multiply 33.557 by 2 and evaluate the cosine
cos (2 * 33.557) = 0.39
