What is 1+cosx1+secx for x=π3?

1 Answer
Jan 2, 2017

1+cosx1+secx=cosx and for x=π3, it is 12.

Explanation:

1+cosx1+secx

= 1+cosx1+1cosx

= 1+cosxcosx+1cosx

= (1+cosx)×cosx1+cosx

= cosx

Hence 1+cosx1+secx=cosx for all values of x

and for x=π3

1+cosx1+secx=1+cos(π3)1+sec(π3)

= 1+121+2=323=32×13=12

As cosx=cos(π3)=12

for x=π3, 1+cosx1+secx=cosx