SOLUTION: Good morning, can somebody help me factorize and solve step by step following equation?: sin(2x)cos(pi/3) - cos(2x)sin(pi/3) + 3^(1/2)(cos(2x)cos(pi/3) + sin(2x)sin(pi/3))-3^(1/2)

Algebra ->  Trigonometry-basics -> SOLUTION: Good morning, can somebody help me factorize and solve step by step following equation?: sin(2x)cos(pi/3) - cos(2x)sin(pi/3) + 3^(1/2)(cos(2x)cos(pi/3) + sin(2x)sin(pi/3))-3^(1/2)      Log On


   



Question 1062122: Good morning, can somebody help me factorize and solve step by step following equation?:
sin(2x)cos(pi/3) - cos(2x)sin(pi/3) + 3^(1/2)(cos(2x)cos(pi/3) + sin(2x)sin(pi/3))-3^(1/2) = 0
Thank you very much RB

Found 2 solutions by rothauserc, Edwin McCravy:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
-sqrt(3) - 1/2 sqrt(3) cos(2 x) + 1/2 sin(2 x) + sqrt(3) (1/2 cos(2 x) + 1/2 sqrt(3) sin(2 x)) = 0
:
Simplify and substitute y = 1/2 sin(2 x)
:
-sqrt(3) - 1/2 sqrt(3) cos(2 x) + 1/2 sin(2 x) + sqrt(3) (1/2 cos(2 x) + 1/2 sqrt(3) sin(2 x)) = (4 sin(2 x))/2 - sqrt(3) = 4y - sqrt(3) = 0
:
4y - sqrt(3) = 0
:
Add sqrt(3) to both sides
:
4y = sqrt(3)
:
Divide both sides by 4
:
y = sqrt(3)/4
:
Substitute back for y = 1/2 sin(2 x)
:
1/2 sin(2x) = sqrt(3)/4
:
Multiply both sides by 2
:
sin(2x) = sqrt(3)/2
:
Take the inverse sine of both sides
:
2x = (2π)/3 + 2πn1 for n1 in Z
or 2x = π/3 + 2πn2 for n2 in Z
:
Simplify each equation
:
Divide both sides by 2
:
x = π/3 + πn1 for n1 in Z
or 2x = π/3 + 2πn2 for n2 in Z
:
Divide both sides by 2
:
*************************************
x = π/3 + πn1 for n1 in Z
:
or x = π/6 + πn2 for n2 in Z
*************************************
:

Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
%22%22=%22%220

%22%22=%22%220

Since cos%28pi%2F3%29=1%2F2 and sin%28pi%2F3%29=sqrt%283%29%2F2

%22%22=%22%220

%22%22=%22%220

The 2nd and 3rd terms cancel out, and the 1st and 4th terms
are like terms and can be combined

2sin%282x%29-sqrt%283%29%22%22=%22%220

2sin%282x%29%22%22=%22%22sqrt%283%29

sin%282x%29%22%22=%22%22sqrt%283%29%2F2

2x%22%22=%22%22matrix%281%2C3%2Cpi%2F3%2B2pi%2An%2Cor%2C2pi%2F3%2B2pi%2An%29

x%22%22=%22%22matrix%281%2C3%2Cpi%2F6%2Bpi%2An%2Cor%2Cpi%2F3%2Bpi%2An%29

Edwin