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IF x^2+y^2=4,then the, value of yy' +x.i...

IF `x^2+y^2=4`,then the, value of yy' +x.is

A

a)-1

B

b)0

C

c)1

D

d)4

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 7-EXERCISE
  1. Thestraight line sqrt3y-3x=3 makes an angle with x axis is

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  2. The equation of diameter to the circle x^2+y^2-6x+2y=15,which-passes, ...

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  3. IF x^2+y^2=4,then the, value of yy' +x.is

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  4. The'value of lim(xrarr0) 1/xsin^-1((2x)/(1+x^2))is

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  5. A and B are two independent events.if P(A)=3/5,P(AcapB)=4/9the value o...

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  6. The mean of square of 1st n natural number is

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  7. show that (A-B)capB=phi

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  8. A relation P defined as :P={(x,y):2x+3y=18,x,y in N} ,find the domain ...

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  9. Find the value of :(8 sin ^3 10^@-6sin10^@)

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  10. If sinA/3=sinB/3=sinC/4then show that cos C=1/9

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  11. Value of i^n+i^(n+1)+i^(n+2)+i^(n+3)(where i=sqrt-1)

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  12. If, the number of-diagonals of a- polygon is 44. Find the number of si...

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  13. 'Prove that the co-efficient of x^n of the expansion of (1+x)^(2n) is...

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  14. The sum of P terms of an AP is P^2. Find the common difference.

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  15. Find the co-ordinate of the point which is equidistance from (alpha, 0...

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  16. Calcualte the angle between the straight linesx+sqrt3 y+2=0and y+5=0

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  17. If f'(c) is the -derivative of f(x) at x= c,then show that lim(xrarrc...

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  18. Evaluate :lim(xrarr3)(x^2-9)/(sqrt(x-2)-sqrt(4-x))

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  19. 4 cards are drawn from a well - shuffled deck of 52 cards. What is the...

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  20. If the variance of a distribution is 4 coefficient of variation is 5%,...

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