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gayaneshka [121]
3 years ago
10

2cos^2x+3cosx-2=0 ...?

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
3 0
Its like a polynomial.
 
cosx=x

so it'll be like

2x^2+3x-2=0

<span>(2x−1)(x+2)
</span>
which makes your life easy because you do not have to solve cos(x)=−2 because it cannot be, so only solve cos(x)=1/2
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