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In A B C ,(a b-r1r2)/(r3),w h e r ea ,b ...

In `A B C ,(a b-r_1r_2)/(r_3),w h e r ea ,b ,r_1r_2, r_3, Ra n dr` have usual meanings, is equal to (A)`R` (B) `2R` (C) `r` (D) none of these

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JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS-All Questions
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  2. Find the number of numbers of five digits that can be made with the ...

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  3. In A B C ,(a b-r1r2)/(r3),w h e r ea ,b ,r1r2, r3, Ra n dr have usual ...

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  4. The exhaustive set of values of a such that, x^2+a x+sin^(-1)(x^2-4x+5...

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  5. The distance of point (-1, -5, -10) from the plane 10 x+2y-z=0 measure...

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  6. Q. Let z1 and z2 be nth roots of unity which subtend a right angle at...

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  7. z1a n dz2 lie on a circle with center at the origin. The point of inte...

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  8. Given the following simultaneous equation for vectors vec x and vec y...

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  11. If the normal to the rectangular hyperbola x y=c^2 at the point (c t ,...

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  12. The number of values of x where the function f(x)=cosx+cos(sqrt(2)x) a...

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  13. Number of solutions of the equation t a n x+s e c x=2cos x lying in th...

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  14. If a tangent to the ellipse x^2/a^2+y^2/b^2=1, whose centre is C, me...

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  15. The area bounded by the curves y=2x-2 , 2y+x=6 and x-axis (A) 5 squ...

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  17. Consider the two arithmetic progressions 3,7,11,...,407 and 2,9,16,....

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  18. If A and B are two square matrices of same order satisfying AB=A and ...

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  19. |(a+1, a+2, a+p), (a+2, a+3, a+q) ,(a+3, a+4, a+r)|=0 , then p, q r ar...

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  20. |z-3i|=2|z-3| represents a straight line passing through (0+3) and (1+...

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