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snivvles.com
 one year ago
Find all solutions to the equation. 7 sin^2x  14 sin x + 2 = 5
snivvles.com
 one year ago
Find all solutions to the equation. 7 sin^2x  14 sin x + 2 = 5

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Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1let sinx = y \[\huge\rm 7y^214y+2=5\] now you have quadratic equation set it equal to zero (move 5 to the left side)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so \[7y ^{2}14y+7=0\]?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right now can you solve for y ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{ 14+\sqrt{1964(7)(7)} }{ 2(7) }\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1oh wait you can take out the common factor

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1\[\huge\rm 7y ^{2}14y+7=0\] what is gcf ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.07 so \[\frac{ 2+\sqrt{44} }{ 2 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so \[\frac{ 2 }{ 2 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then I find where that happens on the unit circle, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but it simplifies to \[\frac{ 1 }{ 1 }\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right so \[\large\rm \frac{ 2 +0 }{ 2} ~and~ \frac{ 20 }{ 2 }\] both equal to one y= 1 now you can replace y with sinx sin x =1 sin x =1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so \[\frac{ \pi }{ 2 }\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1wait do you need in radians or degree ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so 3pi/2 5pi/2 7pi/2 etc. ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh right so is 5pi/2 right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so like pi/2 5pi/2 9pi/2 etc.

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes 5pi/2 can be the solutions

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1but remember sinx =1 (multiplicity of 2)(sinx= 1 , sinx =1)
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