How would you solve arccos

Question

ash2326 · Answer

@jennisicle do you understand the concept of inverse trigonometric ratios?

anonymous · Answer

Not really, it's kind of confusing to me

anonymous · Answer

I somewhat understand it

mathmale · Answer

Solving this problem requires understanding inverse functions.  If you need background info on inverse functions, please ask.  Now, if arccos(2x-1) = Pi/3, we can solve for (2x-1) by taking the cosine of both sides of this equation.  We get 2x-1 = cos(Pi/3), and cos(Pi/3)=cos(60 degrees) = 1/2.  So this problem boils down to 2x-1=1/2.  Solve that for x and you'll be done.

anonymous · Answer

Alright, I wasn't sure if cos cancelled out arccos but that makes sense. Thanks!