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HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
Sin(2x)= 2Sin(x)Cos(x)
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
So I Got ..... (2Sin(x)Cos(x)Sin(x))Cos(x)=0
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
try factoring them (2Sin(x)Cos(x)Sin(x))Cos(x)=0
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
@mark_o. How?
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
Cos(x) (2 Sin(x) Sin(x))1=0
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
Cos(x) (2Sin(x)Sin(x))=1
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
hm lets try this (2Sin(x)Cos(x)Sin(x)) = Cos(x) divide both sides by cos x then (2Sin(x)Sin(x)) = 1 can you continue from here?
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
@mark_o. is it possible to combine the sines?
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
(2Sin(x)Sin(x)) = 1 multiplying 2[Sin(x)]^2 = 1
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
oh i didn't see that 2 was not part of sine
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
ok from here 2[Sin(x)]^2 = 1 [Sin(x)]^2 = 1/2
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
ok then Sin(x)^2 = 1Cos(2x)/2 Right?
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
nope, use power of i/2 on both sides from [Sin(x)]^2 = 1/2 ([Sin(x)]^2)^1/2 = sqrt(1/2) correct? yes or no?
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
How would this make it solve so i get answers to the unit circle?
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
([Sin(x)]^2)^1/2 = sqrt(1/2) \[\sin x=\sqrt{\frac{ 1 }{ 2 }}=\frac{ 1 }{ \sqrt{2} }*\frac{ \sqrt{2} }{ \sqrt{2} }=...?\]
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
yes...you are correct x=45deg =pi/4
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
although this seems not right there should be more to this.... because i thought.... Sin(2x)Sin(x)=Cos(x) Sin(2x)Sin(x)Cos(x)=0 2Sin(x)Cos(x)Sin(x)Cos(x)=0 Cos(x)(2Sin(x)Sin(x))=1 Then Maybe..... Cos(x)(2Sin(x)Sin(x))=1 Cos(x)=1 and 2Sin(x)=1 and Sin(x)=1
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
Attached is a example of this..
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
if it is then Cos(x)=1 has solutions 0 and 2pi 2Sin(x)=1 also as Sin(x)=1/2 solutions pi/6 and 5pi/6 Sin(x)=1 solution pi/2
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
yesssssss thats right 2Sin(x)Cos(x)Sin(x)Cos(x)=0 could be like Cos(x)[(2Sin(x)Sin(x))1]=0 cos x=0 and 2Sin(x)Sin(x))1=0 x= arc cos 0 x=90deg=pi/2 and for 2Sin(x)Sin(x))1]=0 2Sin(x)Sin(x))=1
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
as long as restrictions are [0,2pi)
 2 years ago

mark_o. Group TitleBest ResponseYou've already chosen the best response.1
yes you got it.. lol..:D
 2 years ago

HelpMe94 Group TitleBest ResponseYou've already chosen the best response.0
oh that makes so much more sense after the factoring and combining of sines... lol
 2 years ago
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