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Grade: 11 
        
find the value of a for which the equation  acosx-cos2x=2a-7 possesses a solution
5 years ago

Answers : (1)

Saurabh Kumar
askIITians Faculty
2411 Points 
							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..
5 years ago
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