Is the answer 25pi-78??
2.13 we can write 12 as 7π/2+1.01 and solve
arc(cos(sin12))=arc(cos(cos78)=arc(cos(cos(24pi-78))) as 24pi-78= - 2.6
Now we know arc(cos(cosx))=pi+ x if x ε [-pi,0]
Is my solution wrong?
No 12 is not in degrees but 12 radians here @Sarmila
Ur solution seems correct. Good job..
I am not sure whether it is correct only @anon will verify it
GST- Good night, Sweet dreams, Thank you
It's correct. I was making the small mistake of not adding pi. Thanks a ton.