Question

prove that cos theta + sec theta whole square + sin theta + cosec theta whole square is equals to 7+tan
square theta + cos square theta

Answer 1

hope it may help you.
question has a little mistake.

Answer 2

IDENTITIES USED

1) (a+b)^2=a^2+2ab+b^2

2)sin^2(a)=1+tan^2(a)

3)cosec^2(a)=1+cot^2(a)