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In a polygon, the mesurement of least internal angle is `120^@`. If theall internal angles fohn an AP with common difference `5^@`, then find number of sides of the polygon

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 11-EXERCISE
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  4. In /\XYZthe co-ordinate of Y and Z are (-a, 0) and (a, 0), andangle XZ...

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  5. If the three straight lines ax + 2y + 1 = 0, 3y + bx + 1 = 0 and cx+ 4...

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  6. If the circles x^2+y^2+2ax+c^2=0and x^2+y^2+2by+c^2=0touch each other,...

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  8. Prove that lim(xrarr1)(x^2-sqrtx)/(sqrtx-1)=3

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  9. Prove that sqrt5 is irrational, (use the method of contradiction).

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  11. Find the mean diaviation with respect to median of the frequency dist...

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  12. If (acosthetasecphi-x)/(asin(theta+phi))=(y-bsinthetasecphi)/(bcos(th...

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  13. If sinalpha+sinbeta=1/2,cosalpha+cosbeta=5/4find the value of tanalpha...

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  14. Solve :(x+1)(x+2)(x+3)(x+4)=120

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  15. In a polygon, the mesurement of least internal angle is 120^@. If thea...

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  16. Out of 15 boys, 7 are skaut. In how mariy different way can 12 boys be...

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  17. Draw the graph of the following system of inequation and show the comm...

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  18. Find the equation of a parabola having the co-ordinate,of vertex is (-...

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  19. Find the equation of an ellipse having vertices (-1, 2)- and (9, 2) . ...

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  20. In each of the find the equations of the hyperbola satisfying the give...

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