
Grade 12th passIIT JEE Entrance Exam
If theta belongs to R, the expression a sin^2 theta + b sin theta cos theta +c cos^2 theta lies between?
If theta belongs to R, the expression a sin^2 theta + b sin theta cos theta +c cos^2 theta lies between?

Let S={x:x belongs to R(√3+√2)^(x^2-4) - (√3-√2)^(x^2-4)=10}. Then n(S) is equal to-
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