`3sec^2 (x) - 4 = 0` Solve the equation.

Textbook Question

Chapter 5, 5.3 - Problem 15 - Precalculus (3rd Edition, Ron Larson).
See all solutions for this textbook.

1 Answer | Add Yours

mathace's profile pic

mathace | (Level 3) Assistant Educator

Posted on

Solve the equation `3sec^2(x)-4=0`

`3sec^2(x)=4`

`sec^2(x)=4/3`

`sec(x)=+-sqrt(4/3)`

sec(x)=`+-2/sqrt(3)`

Because cosine and secant are reciprocal functions

`cos(x)=+-sqrt(3)/2`

`x=pi/6+pin`

`x=(5pi)/6+pin`

We’ve answered 318,982 questions. We can answer yours, too.

Ask a question