Compute Trig functions

[Tinkermom]

Ok, I attached where I am with this problem.

Compute cos[sin(pi/10)]

I'm not sure if I am doing this right. Any help would be appreciated.

 

[Deleted member 4993]

Ok, I attached where I am with this problem.

Compute cos[sin(pi/10)]

I'm not sure if I am doing this right. Any help would be appreciated.

1/6 added to 1/4 does NOT equal to 1/10.

Did you post the correct problem? - please check and confirm.

 

[Tinkermom]

It is the right question..I just don't know how to do this... sorry.

 

[Deleted member 4993]

You are sure that the functions did not involve sin[sup:1sba1aoo]-1[/sup:1sba1aoo] or cos[sup:1sba1aoo]-1[/sup:1sba1aoo] functions?