We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
20
3
avatar

How do you solve an equation like this: -2cos(x)^2=-1

 Apr 10, 2019
 #1
avatar+18049 
+2

-2 cos^2 = -1     divide both sides of the equation by  -2

cos^2 = 1/2

cos = +- sqrt 2 / 2          pi/4   3 pi/4    5pi/4      7 pi/4

 Apr 10, 2019
 #2
avatar+2067 
+2

👍👍

 

Ecellent 

Nickolas  Apr 10, 2019

2 Online Users