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  1. R

    prove

  2. R

    prove trig

    prove that
  3. R

    ABCD is a square

    very very nice thank you
  4. R

    ABCD is a square

    ABCD is a square of side 10 unit. Arc of circles with centres at ABCD are drawn in. find the area of the central region bounded by the four arcs
  5. R

    find sum

    nice thanks:spin:
  7. R

    find sum

    find sum sin 1+sin 2+ sin 3+...+sin 359
  8. R

    Find the value

    Is the answer 4005? yes :) very good but how
  9. R

    Four people

    17 min is rite
  10. R

    Four people

    19 minutes? no it is not true
  11. R

    Four people

    Four people, A, B, C, and D, are on one side of a bridge, and they all want to cross the bridge. However, it's late at night, so you can't cross without a flashlight. They only have one flashlight. Also, the bridge is only strong enough to support the weight of two people at once. The four...
  13. R

    Find the value

    1. Find the value of tan²1+ tan²3+.. ...+tan² 89. 2.Find the ordered pairs x and y where x and y are real numbers such that x and y satisfy the two equations below. (1/sqrt x)+(1/sqrt y)=(x+3y)(3x+y) (1/sqrt x)-(1/sqrt y)=2 (y^2-x^2)
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