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Mathematics · Trigonometry

यदि 2cos2θ − 9cosθ + 7 = 0 है, तो cos2θ + sec2θ का मान क्या है?

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यदि 2cos2θ − 9cosθ + 7 = 0 है, तो cos2θ + sec2θ का मान क्या है?

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