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$2 \cos^{2} â¡ x + 4 \cos â¡ x = 3 \sin^{2} â¡ x$ if

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cosâ¡x=â2+145

cosâ¡x=â2+195

sinâ¡x=â2+145

sinâ¡x=â2+195

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detailed solution

Correct option is B

2cos2â¡x+4cosâ¡x=31âcos2â¡xâ5cos2â¡x+4cosâ¡xâ3=0âcosâ¡x=â4Â±16+6010=â2Â±195But cosâ¡xâ â2â195

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2cos2â¡x+4cosâ¡x=3sin2â¡x if

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$2 \cos^{2} â¡ x + 4 \cos â¡ x = 3 \sin^{2} â¡ x$ if