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If a ,b ,c are in G.P. with common rati...

If `a ,b ,c` are in G.P. with common ratio `r_1a n dalpha,beta,gamma` are in G.P. with common ratio `r_2` and equations `a x+alphay+z=0,b x+betay+z=0,c x+gammay+z=0` have only zero solution, then which of the following is not true? a.`a+b+c` b. `a b c` c.`1` d. none of these

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  5. In triangle A B C , if |1 1 1cotA/2cotB/2cotC/2tanB/2+tanC/2tanB/2+tan...

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  16. If a >0 and discriminant of a x^2+2b x+c is negative, then |[a,b,ax+...

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  17. If |(a-b-c,2a,2a),(2b,b-c-a,2b),(2c,2c,c-a-b)|=(a+b+c) xx(x + a + b...

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  18. If a(1), a(2), a(3), ………, a(n)….. are in G.P., then the determinant De...

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  19. By using properties of determinants , show that : {:[( a^(2) + 1, a...

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  20. Let vec ar=xr hat i+yr hat j+zr hat k ,r=1,2,3 be three mutually per...

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