Question

if sina=1÷2 find the value of 2Seca÷1+tan^2A

Answer 1

See the pic
This may help u

Answer 2

sina=1/2
sin^2a+cos^2=1
cos^2a=1-1/4
cosa=√3/2
tana=1/√3
tan^2a=1/3
seca=1/sina=2
2seca÷1+tan^2A