Question

(Sin2A+cosec2A) +(cos2A+sec2A)=7tan2A+cot2A

Answer 1

Step-by-step explanation:

(sinA+cosecA) square+(cosA+secA) square

{there it is in (a+b) square}

=sin square A+2 sinAcosA+cosec square A+cos square A+2cosA secA+sec square A

=sin square A +2+cosec square A+cos square A+2+sec square A

=4+sin square A+cos square A+cosec square A+sec square A

{therefore by trigonometry identities we can say that

cosec square A-cot square A=1

cosec square A=1+cot square A}

=7+tan square A+cot square A

therefore;

hence proved

1. HOPE THIS WILL HELP YOU