Question

Use a calculator to find the approximate value of arccos(0.63).

Answer 1

@hartnn please help me

Answer 2

its the same as finding

\[\cos^{-1}(0.63) \]

here is an online calculator

http://web2.0calc.com/

press the 2nd key, then cos (0.63) =

hope this helps

Answer 3

It gives me this 0.45399049974

Answer 4

But thats not one of my answers, my answers are :
39.05
50.95°
78.1°32.21°

Answer 5

so you pressed 2nd acos (0.63) =

wow I didn't get that

Answer 6

the last one is 32.21° sorry

Answer 7

What do you get?

Answer 8

well try again... press 2nd

then the cos key

the display shows acos(

enter 0.63)

then press equals...

Answer 9

opps pressing the 2nd key..

then you get the acos key option

Answer 10

I was pressing -1 cos.....
i got the answer50.949877463847

Answer 11

Thank you!