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O is the circumcentre of triangleABC and...

O is the circumcentre of `triangleABC` and D is the midpoint of BC, if `angleBAC = 40^@`, then `angleBOD`=?

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UNITED BOOK HOUSE-BIDHANNAGAR GOVT, HIGH SCHOOL-EXERCISE
  1. Find the simple interest on Rs.68,000 at 50/3% per annum for 9 months ...

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  2. If a=1/(2+sqrt3) and b=1/(2-sqrt3), then (1/(a+1)+1/(b+1))=?

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  3. O is the circumcentre of triangleABC and D is the midpoint of BC, if a...

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  4. In triangleABC, DE||BC and if AD:BD = 3:1 then DE:BC=?

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  5. Express 1+4 cosec^2 theta.cot^2theta as a perfect square.

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  6. In a partnership business, the ratio of capitals of Pathik, Pabirta an...

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  7. If the sum of the roots of the equation x^2-x=K(2x-1) is zero, then fi...

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  8. Convert 83.12^@ into degrees, minutes and seconds.

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  9. If the volume, base area and height of a right circular cone are V cu ...

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  10. Sum of length, breadth and height of a cuboid is 25cm and the total su...

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  11. x and u are two variables with relation x= (U-15)/10. If the mean valu...

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  12. Answer any one question : The difference between simple interest and ...

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  13. Dipu, Rabeya and Megha started a partnership business on 1st January o...

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  14. Solve: x/(x+1)+(x+1)/x= 2 1/12(x!=0,-1)

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  15. If a two digit positive number is multiplied by its unit digit, then t...

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  16. If x= sqrt3+sqrt2 ,find the value of x^3-1/x^3.

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  17. If x/y alphax+y and y/x alpha x-y, then show that x^2-y^2= constant.

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  18. If 1/(b+c)+1/(c+a) = 2/(a+b) , show that a^2+b^2=2c^2,

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  19. If a+b+c= 0 prove that 1/(2a^2+bc)+1/(2b^2+ca)+1/(2c^2+ab)=0

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  20. State and Prove Pythagoras theorem.

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