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kjuchiha
Please help: Find all solutions to the equation. sin^2(x) + sin (x) = 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\[2\cos x+1=0\]
but the equation is sin^2(x)
oh sorry\[\sin^2 x+\sin x=0\]take out common factor\[\sin x(\sin x+1)=0\]easier :)
\[\sin x=0\]or\[\sin x=-1\]
a little but i dont know how to get the solutions
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
u substitute x value in sin(x) and -1 is co-terminal (270) angle and 0