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find the value of a for which the equation acosx-cos2x=2a-7 possesses a solution find the value of a for which the equation acosx-cos2x=2a-7 possesses a solution
Express, cos 2x in basic cosine function, then assume cos x = y, it would be a quadtric equation then, apply the range of cos x and solve the equation...Proceed accordingly..
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