Question

Can someone help please
Rewrite sec(65°) in terms of its cofunction

Answer 1

What is the cofunction of sec and what is its relation to sec?

Hint: what is the relation between sin and cosin?

Answer 2

Secant goes with cosign right? Its equal to the cofunction of angles complement

Answer 3

cosec, yes. Now sin(90-x) = cos(x).

Hence
1/cos(x) = 1/sin(90-x)
which means by definition of sec and cosec that
sec(x) = cosec(90-x)

Answer 4

Got your answer then?
sec(65) = cosec( .....what? ....)