Is 2sin^2(x)+sin(x)=0 ?

The answer to whether 2sin^2(x)+sin(x)=0 is False

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prove 2sin^2(x)+sin(x)=0

prove

2 sin^{2} (x) + sin (x) = 0

False

Solution steps

2 sin^{2} (x) + sin (x) = 0

Show that the two sides are not equal

For

2 sin^{2} (x) + sin (x) = 0

plug in

x = 1

2 sin^{2} (1) + sin (1) = 2.25761 \dots

2 sin^{2} (1) + sin (1)

Refine to a decimal form

= 2.25761 \dots

The two sides are not equal

\Rightarrow False

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