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kjuchiha
Group Title
Please help:
Find all solutions to the equation.
sin^2(x) + sin (x) = 0
 one year ago
 one year ago
kjuchiha Group Title
Please help: Find all solutions to the equation. sin^2(x) + sin (x) = 0
 one year ago
 one year ago

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mukushla Group TitleBest ResponseYou've already chosen the best response.0
ok u know that\[\sin 2x=2 \sin x\cos x\]so equation becomes\[2 \sin x\cos x+\sin x=0\]take out common factor\[\sin x(2\cos x+1)=0\]using zero product property\[\sin x=0\]or\[2\cos x+1=0\]
 one year ago

kjuchiha Group TitleBest ResponseYou've already chosen the best response.0
but the equation is sin^2(x)
 one year ago

mukushla Group TitleBest ResponseYou've already chosen the best response.0
oh sorry\[\sin^2 x+\sin x=0\]take out common factor\[\sin x(\sin x+1)=0\]easier :)
 one year ago

mukushla Group TitleBest ResponseYou've already chosen the best response.0
\[\sin x=0\]or\[\sin x=1\]
 one year ago

mukushla Group TitleBest ResponseYou've already chosen the best response.0
makes sense?
 one year ago

kjuchiha Group TitleBest ResponseYou've already chosen the best response.0
a little but i dont know how to get the solutions
 one year ago

Supenova Group TitleBest ResponseYou've already chosen the best response.0
u start like this: Let x be sin(x) and x^2+x=0 x(x+1)=0 then, x=0; & x=1 sin is at radian 3/4pi and pi
 one year ago

Supenova Group TitleBest ResponseYou've already chosen the best response.0
u substitute x value in sin(x) and 1 is coterminal (270) angle and 0
 one year ago
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