How do you write the equation #cosalpha=0.5# in the form of an inverse function?

Question

↳Redirected from "Question #f8633"

2794 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-02-28T15:34:11

We need to solve for #alpha#

#cosalpha = 0.5#

we need to "undo" #cos#. To do that,w e apply it's inverse, #a r c c o s# or #cos^-1#

#cos^-1(cosalpha) = cos^-1(0.5)#

#alpha = cos^-1(0.5)#

We can solve this, which gives us that #alpha = pi/3# or #5pi/3#