Question

Plzz solve this fast

Answer 1

you can also use tan^2 X + 1 = sec^2 X

Answer 2

tanA=20/21

so sinA=20/29

cosA=21/29

1-sinA+cosA/1+sinA+cosA

=1-20/29+21/29/1+20/29+21/29

= 1+1/29/1+41/29

=29+1/29/29+41/29

=30/70

=3/7