Register
Cos2x + cosx + 1=0 lam on dum
230k views
3 votes
Cos2x + cosx + 1=0
lam on dum

User Raj Tamakuwala
by
3.6k points

1 Answer

6 votes

Explanation:

cos(2x)+cos(x)+1=0{2cos^2(x)-1}+cos(x)+1=0

let cos x=y

2y^2+y+1=0

  1. now solve for y and then solve for y=cosx
User Sleiman
by
3.3k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

3.6m questions

4.6m answers

Other Questions

A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike symptoms during the same month. The study had a margin of error of 1.8%. What does
Solve for x in the equation 3 x squared minus 18 x + 5 = 47. (I need this to be an answer like X=3+\_ square root 23)
Can someone help me plz I have to Turn 27/9 in simplest
The sanchez family goes out for dinner, and the price of the meals is $60. The sales tax on the Meals is 7 percent, and they also want to leave a 15 percent tip. What is the total cost of the meal? Analyze
Simplify: 10 ÷ [(5 + 2) − 5]
Link Copied!