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Solve 2cos^2x+3cosx-2=0
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Solve 2cos^2x+3cosx-2=0
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Apr 28, 2019
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Solve 2cos^2x+3cosx-2=0
Mathematics
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McVenco
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now, for the second case, recall that the cosine is always a value between -1 and 1, so a -2 is just a way to say, such angle doesn't exist.
Aamir M Meman
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May 2, 2019
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Aamir M Meman
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