Question

if sec 4a=2, then the value of A is ?​

Answer 1

Answer:

since, we can write sec(4a)=1/cos4a

so,

= 1/cos4a=2

=cos4a=1/2

= cos4a=cosπ/3

= 4a=π/3

= 12a=π

hence, a=π/12 is right answer.