If sec (4x - 50°) = cosec(50° - x), Then the value of x is

A circle has its centre at O . A tangent drawn from a point P , which is situated outside the circle, touches the circle at A. If PA = 4 cm & PO=5 cm, then the length of the radius of the circle is

D, E, F are the mid - points of the sides BC , CA and AB respectively of a ΔABC . Then the ratio of the areas of ΔDEF and ΔABC is

If x = 93 , y = 93 , z = 94 then the value of x2 - y2 + 10xz + 10yz is

If 1p+1q = 1p+q, then the value of p3-q3

The average temperature of Monday ,Tuesday , Wednesday and Thursday is 60°, The average for Tuesday, Wednesday, Thursday and Friday is 63°; If the ratio of temperature for Monday and Friday is 21 : 25, then what is the temperature of Friday ?

In a school , 391 boys and 323 girls have been divided into the largest possible equal classes , so that each class of boys numbers the same as each class of girls . What is the number of classes ?

If tanθ = 43, then the value of 3sinθ+2cosθ3sinθ-2cosθ ?