Question

Prove number 6 using trigonometric identities

Answer 1

the answer is really simple!!!!
promise me that you willl mark the answer as the brainliest
ok lets begin
(1-tan²A)+(1+tan²A)=
(1-(sec²A-1))+(1+sec²A+1)=
(1-sec²A+1)+(1+sec²A+1)=
(2-sec²A)+(2+sec²A)=
2-sec²A+2+sec²A=
4
thank you