SOLUTION: Solve equation for all value of � if � measure in degrees 2cos^2�+2=5cos�

Question 399987: Solve equation for all value of � if � measure in degrees
2cos^2�+2=5cos�

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solve equation for all value of � if � measure in degrees
2cos^2�+2=5cos�
-------------
2cos^2 - 5cos + 2 = 0
---
2cos^2 - 4cos-cos +2 = 0
---
2cos(cos-2) - (cos-2) = 0
(cos-2)(2cos-1) = 0
cos = 2 or cos = 1/2
---
cos(theta) = 1/2
----
theta = pi/3
===================
Cheers,
Stan H.
==========
RELATED QUESTIONS
Solve equation for all value of � if � measure in degrees 2cos^2�+2=5cos� (answered by Tatiana_Stebko)

Solve 2cos^2 - 5cos(x) +2 =0 for principal values of x. Express the solution(s) in... (answered by stanbon)

Solve equation for all value of � if � measure in degrees cos^2� -5/2cos�... (answered by ewatrrr)

Solve equation for all value of � if � measure in degrees es cos^2� -5/2cos� -3/2=0 (answered by stanbon)

(cos�)(sin2�)-2sin�+2=0 Solve equation for all value of � if � measure in degrees (answered by Tatiana_Stebko)

Solve equation for all value of � if � measure in degrees... (answered by Tatiana_Stebko)

Solve equation for all value of � if � measure in degrees cos2�+3cos�... (answered by Tatiana_Stebko)

Solve equation for all value of � if � measure in degrees 34)4cos^2�-4cos�+1 =... (answered by lwsshak3)

Solve for 0≤theta≤360, 2cos^2 theta +5cos... (answered by ikleyn)