## ** TRIGONOMETRIC EQUATIONS - Exercise 4**

Solve the equation . Restrict
solutions to the interval .

Solution: The substitution yields the equation
, which is quadratic in *u*.
We use the quadratic formula
to solve for :

If the calculator gives *x*=1.1191 as the acute
solution, so we deduce that the other solution is
. The equation has no solutions,
since for all *x*. The solution set is therefore
.

**
**

**
[Trigonometry]
[Back]
[Next]
**** **
[Geometry]
[Algebra]
[Differential Equations]
[Calculus]
[Complex Variables]
[Matrix Algebra]

S.O.S MATHematics home page
Do you need more help? Please post your question on our
S.O.S. Mathematics CyberBoard.

*Luis Valdez-Sanchez *

Tue Dec 3 17:39:00 MST 1996

Copyright © 1999-2019 MathMedics, LLC. All rights reserved.

Contact us

Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA

users online during the last hour