Trigonometric Identities and equations

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Homework Help Overview

The discussion revolves around solving a trigonometric equation within the specified domain of 0°

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss rearranging the equation sinx - 2 cos x = 0 and question how to proceed from this point. Suggestions include rewriting the equation and considering division to simplify the expression.

Discussion Status

The conversation is active, with participants offering suggestions for manipulation of the equation. One participant indicates they have reached a solution, but the details of that solution are not shared in the discussion.

Contextual Notes

The problem is constrained by the requirement to solve within a specific domain, and participants are navigating the implications of this constraint while discussing their approaches.

wei1006
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1) Problem statement:
Solve the trigonometric equation for the domain is. 0°<x<360°
5(sinx - cosx) = 4sinx - 3cosx

2) relevant equations:
secx=1/cosx
cosec x=1/sinx
cot x= 1/tanx
tan x=sinx/cosx
cot x=cosx/sinx
sin^2 x + cos^2 x=1
1 + tan^2 x= sec^2 x
1+ cot^2 x = cosec^2 x

Template of answer:
New domain:
Basic angle=
Quadrants=
Solve for x
3)Attempt the question
5(sin x - cosx)=4sinx - 3cosx
5sinx-4sinx-5cosx+3cosx=0
sinx - 2 cos x=0
 
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wei1006 said:
sinx - 2 cos x=0

Fine up to here, so what is the solution to this equation?
 
I am not sure how to continue...
 
How about trying to rewrite it by placing the 2 cos x on the other side and then dividing by something that makes it easier?
 
Thank you for your help, have solved it
 

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