I dont know how to work the tan, cos or sin on my calculator.. can someone please explain to me how it works?!

Question

zepdrix · Answer

Do you have a specific problem you're trying to solve?
What type of calculator do you have? :)

anonymous · Answer

i have a TI-85. the problem is Find the missing value to the nearest hundredth.

cos ___ =  9/20  
A.)26.74°
B.)80.63°
C.)63.26°
D.)24.23

jim_thompson5910 · Answer

type

2nd key,  cos key, then type in "9/20)" without quotes and hit enter

make sure you're in degree mode

jim_thompson5910 · Answer

when you hit the 2nd key, then the cosine key, you are using the inverse cosine or arccosine function to find the missing angle

anonymous · Answer

to see if you're in degrees mode press 'MODE'

anonymous · Answer

Thanks!

jim_thompson5910 · Answer

yw