I need help with this one.....and maybe a few more

Find the measure of each angle to the nearest tenth of a degree.
cos Y=0.5135

a) 30.9
b) 59.1
c) 0.5135
d) 27.2

thanks alot!

2. Originally Posted by RLL
I need help with this one.....and maybe a few more

Find the measure of each angle to the nearest tenth of a degree.
cos Y=0.5135

a) 30.9
b) 59.1
c) 0.5135
d) 27.2

thanks alot!
this is just a calculator problem

$\cos Y = 0.5135 \implies Y = \cos^{-1}(0.5135)$

now enter that into your calculator and continue