Welcome :: Homework Help and Answers :: Mathskey.com

Q&A
Unanswered
Categories
Users
Ask a Question

Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

Q&A Categories
BASIC MATH (93)
PRE-ALGEBRA (441)
ALGEBRA 1 (2,220)
GEOMETRY (864)
ALGEBRA 2 (2,751)
TRIGONOMETRY (1,187)
PRECALCULUS (1,903)
CALCULUS (2,802)
STATISTICS (129)
PHYSICS (659)
CHEMISTRY (137)
MECHANICAL ENGINEERING (64)
ELECTRICAL ENGINEERING (207)
Winplot Tutorials (2)

Most popular tags

solving-equations system-of-equations functions math slope-intercept-form physics homework-help trigonometric-identities integration limits substitution-method calculus

13,459 questions

17,854 answers

1,446 comments

811,639 users

Cos2x-6cosx-1=0 ,[0,π]

0 votes

solve-trigonometric-equations

asked Oct 7, 2018 in TRIGONOMETRY by anonymous

Share this question

Google+ Facebook Twitter LinkedIn Reddit

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 votes

cos2x-6cosx-1=0

(2cos^2x-1)-6cosx-1=0

2cos^2x-6cosx-2=0

cos^2x-3cosx-1=0

cosx=(3+√13)/2 or( 3-√13)/2

x=107.46

answered Oct 9, 2018 by lilly Expert
reshown Oct 9, 2018 by bradely

Please log in or register to add a comment.

Related questions

Cos2x + 5cos(x+π) = -3?

asked Jul 23, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Find two solutions of each equation? Give your anwser in radians (0 < \theta < 2 π). Dont use no caculator.

asked Sep 5, 2018 in TRIGONOMETRY by rockstar Apprentice

trignometric-equations
solve-trigonometric-equations

cos2x = 2-sec^2x/sec^2x

asked Mar 10, 2014 in TRIGONOMETRY by rockstar Apprentice

trigonometric-identities
solve-trigonometric-equations

Solve sin4x*cosx-sinx*cos4x=1/2 on the interval [0,2pi)

asked Oct 11, 2020 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Solve the equation in the interval [0, 2π). cos 2x = cos x - 1

asked Mar 11, 2014 in TRIGONOMETRY by linda Scholar

solve-trigonometric-equations
solving-equations

solve equation usnig domain (0,2pi). 3sinx-2=5sinx-1

asked Mar 11, 2014 in TRIGONOMETRY by mathgirl Apprentice

solve-trigonometric-equations
solving-equations

solve the equation Sec^2x-Tan x=1 within [0,2pi)

asked Mar 11, 2014 in TRIGONOMETRY by harvy0496 Apprentice

solving-equations
solve-trigonometric-equations

solve cos^2(x) – 5cos(x) – 1 = 0

asked Mar 3, 2014 in TRIGONOMETRY by johnkelly Apprentice

solve-trigonometric-equations

Solve on the interval [0,2pi) : 1-cos theta=1/2

asked Feb 21, 2014 in TRIGONOMETRY by linda Scholar

solve-trigonometric-equations
solving-equations

find all solutions in the interval (0,2pi): 2 sin^2 x-5sinx=-3

asked Jun 29, 2019 in TRIGONOMETRY by nazmi Rookie

solve-trigonometric-equations

Find the solutions of 2cos^2+3sin=0 in integer of [0,2pi)

asked May 16, 2019 in TRIGONOMETRY by anonymous

solve-trigonometric-equations
solve-trigonometric-expression

solve the equation on the interval 0<theta <2pi. 2cos theta +3 =2

asked Oct 4, 2018 in TRIGONOMETRY by devkin26 Rookie

solve-trigonometric-equations

Find all real numbers in the interval [0,2pi) that satisfy the equation. 3sec^2xtanx=4tanx

asked Nov 11, 2016 in TRIGONOMETRY by anonymous

precalculus
solve-trigonometric-equations
trigonometric-equations

Solve on the interval of 0<or equal to. (theta) < 2(pi).

asked Nov 6, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Find all the values of θ between 0 and 2π for which

asked Nov 3, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Find all values of x in the interval [0, 2π]

asked Aug 30, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Sin 2 theta - sin theta = 0

asked Aug 14, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

How do I solve for x on the interval [0, 2pi]

asked Aug 9, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Solve each equation for exact solutions over the interval [0,2pi]

asked Jul 16, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Find all real numbers in the interval [0,2π) that satisfy the equation.?

asked May 4, 2014 in TRIGONOMETRY by anonymous

solve-trigonometric-equations

Copyright © 2024 MATHSKEY. All Rights Reserved. Sitemap|Terms Of Use|Disclaimer|Contact Us|FAQ

...