Question

How do you use `csctheta=4` to find `sectheta`?

Answer 1

`sectheta=+-4/sqrt15`

Explanation:

As `csctheta=4`, `sintheta=1/csctheta=1/4`

and `costheta=sqrt(1-sin^2theta)=sqrt(1-(1/4)^2)=sqrt(15/16)=+-sqrt15/4`

and `sectheta=+-4/sqrt15`