Question

see the attached file and answer it for me
Question 18,19​

Answer 1

MATE

YOUR SOLUTION IS IN ATTACHED PICTURE ☺️

Answer 2

18) secx=tanx. Secx

Sec^2x-tan^2x=1

Sec^2x=1+tan^2x

Rootsec^2x=root1+tan^2x

Secx=root 1+tan^2x

Rootsecx=1/2rootsecx+secx. Tanx

19)tan^2x=2tanx+sec^2x....